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Question 1761Question →

A 2828-year-old woman, gravida 22, para 11, at 4040 weeks of gestation is evaluated on the labor unit. She was admitted 66 hours ago in spontaneous labor. Her prenatal course was unremarkable. Spontaneous rupture of membranes occurred 33 hours ago, yielding clear fluid. Her temperature is 37.1∘C37.1^\circ\text{C} (98.8∘F98.8^\circ\text{F}), blood pressure is 118/76 mm Hg118/76\text{ mm Hg}, and pulse is 82/min82/\text{min}. Vaginal examination reveals the cervix is 7 cm7\text{ cm} dilated, 100%100\% effaced, with the fetal vertex at 00 station. An external tocodynamometer records uterine contractions every 33 to 4 minutes4\text{ minutes}. The fetal heart rate tracing demonstrates a baseline of 145/min145/\text{min} with moderate variability. There are recurrent, visually abrupt decreases in the fetal heart rate to 85/min85/\text{min}. The time from the onset of the deceleration to the absolute nadir is consistently 1515 to 20 seconds20\text{ seconds}. These decelerations last approximately 50 seconds50\text{ seconds} and occur with over 80%80\% of the contractions. Notably, the nadir of each deceleration exactly matches the peak of the corresponding uterine contraction. Position changes to the left lateral decubitus and an intravenous fluid bolus fail to alter the fetal heart rate pattern. Which of the following is the most appropriate next step in management?

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Answer: Amnioinfusion

Answer

Amnioinfusion
The correct next step in management is amnioinfusion. This patient's fetal heart rate (FHR) tracing demonstrates recurrent variable decelerations. The critical diagnostic hallmark that distinguishes a variable deceleration from an early or late deceleration is the rate of descent. According to standard obstetric guidelines (NICHD terminology), a variable deceleration is defined by a visually abrupt decrease in the FHR, where the time from the onset of the deceleration to its nadir is <30 seconds< 30\text{ seconds}. Conversely, early and late decelerations are defined by a gradual decrease (onset to nadir ≥30 seconds\ge 30\text{ seconds}). A common pitfall is categorizing decelerations solely based on their timing relative to the uterine contraction. Although the nadir of the decelerations in this patient perfectly coincides with the peak of the contractions (a timing pattern classically taught for early decelerations), the abrupt nature of the drop (1515 to 20 seconds20\text{ seconds} to nadir) definitively categorizes them as variable decelerations. Variable decelerations are caused by umbilical cord compression. When they become recurrent (occurring with ≥50%\ge 50\% of contractions) and fail to resolve with initial conservative measures such as maternal repositioning and intravenous fluid boluses, further intervention is required to prevent fetal acidemia. Amnioinfusion involves instilling isotonic fluid into the amniotic cavity to restore fluid volume, thereby cushioning the umbilical cord and relieving the compression.

Step-by-Step Solution

1
Analyze the fetal heart rate (FHR) tracing characteristics for the rate of descent.
The FHR shows abrupt decreases, defined as the time from onset to nadir being <30 seconds< 30\text{ seconds} (specifically 1515 to 20 seconds20\text{ seconds}).
Identifying the rate of descent is the primary required criterion for classifying a deceleration as variable versus early or late.
2
Classify the deceleration type based on ACOG definitions.
The decelerations are classified as variable decelerations, regardless of the fact that their nadir aligns with the contraction peak.
Variable decelerations are defined strictly by an abrupt decrease (onset to nadir <30 seconds< 30\text{ seconds}). Early decelerations require a gradual decrease (≥30 seconds\ge 30\text{ seconds}).
3
Determine the underlying pathophysiology and severity.
The patient is experiencing recurrent variable decelerations (occurring with >50%> 50\% of contractions) due to umbilical cord compression.
The abrupt drop in FHR is a vagal response to the rapid increase in fetal blood pressure when the umbilical arteries are compressed.
4
Determine the next best step in management for recurrent variable decelerations that fail initial conservative measures.
Amnioinfusion is indicated.
Instilling normal saline into the uterine cavity artificially restores amniotic fluid, providing a fluid cushion around the umbilical cord and relieving the compression.

Key Concept

Fetal heart rate decelerations are categorized primarily by their shape (abrupt vs. gradual). An abrupt deceleration (onset to nadir <30 seconds< 30\text{ seconds}) is a variable deceleration, even if its nadir perfectly coincides with the peak of a contraction. The first-line specific treatment for recurrent variable decelerations not responding to maternal repositioning is amnioinfusion.

Alternative Method

When evaluating FHR tracings, physically counting the grid squares from the start of the FHR drop to its lowest point (nadir) can prevent errors. Each small square represents 10 seconds. If the drop takes fewer than 3 small squares (< 30 seconds), it is a variable deceleration regardless of any other features.
Estimated Time:1m 30s
Question 1762Question →

A 32-year-old gravida 3, para 2 woman at 38 weeks gestation is admitted to the labor and delivery unit. She reports that her "water broke" an hour ago at home, followed immediately by a moderate amount of bright red vaginal bleeding. She denies any uterine contractions or abdominal pain. Her two previous deliveries were by cesarean section. Her blood pressure is 110/70 mm Hg, and her pulse is 88/min. The fetal heart rate tracing demonstrates a baseline of 140/min with a smooth, undulating, sine-wave-like pattern oscillating with an amplitude of 15 beats per minute at a frequency of 4 cycles per minute. There is no beat-to-beat variability, and no accelerations or decelerations are noted. The uterus is soft and non-tender on palpation. Which of the following is the most appropriate next step in management?

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Answer: Emergent cesarean delivery

Answer

The most appropriate next step in management is emergent cesarean delivery.
The correct answer is emergent cesarean delivery. The clinical presentation of painless vaginal bleeding immediately following spontaneous rupture of membranes, combined with a history of prior cesarean deliveries, is highly suspicious for a ruptured vasa previa. The fetal heart rate tracing described—a smooth, undulating wave with a frequency of 3-5 cycles per minute and absent beat-to-beat variability—is a sinusoidal pattern. A sinusoidal pattern is a Category III fetal heart rate tracing that specifically indicates severe fetal anemia or hypoxia. In this context, the torn fetal vessels from the vasa previa are causing rapid fetal exsanguination. Therefore, the most appropriate and life-saving next step is an emergent cesarean delivery to prevent fetal demise.

Step-by-Step Solution

1
Analyze the patient's clinical presentation.
The history of prior cesareans and painless vaginal bleeding immediately following spontaneous rupture of membranes is highly suspicious for a ruptured vasa previa.
Prior uterine surgeries increase the risk of abnormal placentation, and painless bleeding upon amniotomy is the classic presentation of torn fetal vessels.
2
Interpret the fetal heart rate tracing description.
The tracing describes a sinusoidal pattern, which is classified as a Category III tracing.
A smooth, undulating sine-wave pattern with absent beat-to-beat variability and a frequency of 3-5 cycles per minute is the hallmark of a sinusoidal tracing, indicating severe fetal anemia or hypoxia.
3
Determine the appropriate management based on the diagnosis and tracing.
Emergent cesarean delivery must be performed immediately.
A ruptured vasa previa leads to rapid fetal exsanguination (as evidenced by the sinusoidal pattern). Any delay for further diagnostics or conservative resuscitation will likely result in fetal demise.

Key Concept

A sinusoidal fetal heart rate pattern in the setting of painless vaginal bleeding after membrane rupture indicates ruptured vasa previa and severe fetal anemia, necessitating emergent cesarean delivery.
Estimated Time:1m 30s
Question 1763Question →

During a routine evaluation at a women's health clinic, a 31-year-old G2P2 reports a 4-day history of worsening lower pelvic discomfort, deep dyspareunia, and intermittent vaginal spotting. Her last menstrual period occurred 2 weeks ago. She mentions becoming sexually active with a new partner two months ago. Her medical history is significant for the insertion of a copper intrauterine device three years ago. Her temperature is 38.2°C (100.8°F), blood pressure is 110/70 mmHg, and pulse is 88/min. Speculum examination reveals a yellow, mucopurulent discharge at the cervical os along with visible intrauterine device strings. Bimanual examination elicits significant cervical motion tenderness as well as bilateral adnexal fullness and guarding. A urine pregnancy test is negative. Which of the following is the most appropriate next step in the management of this patient?

Show answer & explanation

Answer: Administer intramuscular ceftriaxone, oral doxycycline, and oral metronidazole; leave the intrauterine device in place

Answer

Administer intramuscular ceftriaxone, oral doxycycline, and oral metronidazole; leave the intrauterine device in place
The correct approach is to administer intramuscular ceftriaxone, oral doxycycline, and oral metronidazole while leaving the intrauterine device in place. This patient meets the clinical criteria for mild-to-moderate pelvic inflammatory disease (PID). Because she is hemodynamically stable, not pregnant, and lacks signs of severe systemic illness or a tubo-ovarian abscess, outpatient management is appropriate. The Centers for Disease Control and Prevention (CDC) recommends a single intramuscular dose of ceftriaxone along with 14 days of oral doxycycline and oral metronidazole to provide comprehensive coverage against Neisseria gonorrhoeae, Chlamydia trachomatis, and anaerobic organisms. Furthermore, current guidelines recommend leaving the intrauterine device in place during initial therapy; it should only be removed if the patient fails to show clinical improvement after 48 to 72 hours of targeted treatment.

Step-by-Step Solution

1
Identify the clinical syndrome based on the presentation.
The patient has pelvic pain, fever, mucopurulent cervicitis, and cervical motion tenderness, which establishes a clinical diagnosis of acute pelvic inflammatory disease (PID).
Recognizing the diagnostic criteria for PID is the first step before determining the setting of care and pharmacotherapy.
2
Determine the appropriate setting of care (inpatient vs. outpatient).
The patient is hemodynamically stable, tolerating oral intake, not pregnant, and lacks signs of a surgical emergency or severe systemic toxicity.
Mild-to-moderate PID can be safely managed in an outpatient setting, avoiding unnecessary hospitalization and intravenous antibiotics.
3
Select the guideline-concordant empiric antibiotic regimen.
Outpatient treatment requires coverage for N. gonorrhoeae, C. trachomatis, and anaerobes using a single dose of IM ceftriaxone plus 14 days of oral doxycycline and oral metronidazole.
Polymicrobial coverage is essential to prevent long-term sequelae such as infertility and chronic pelvic pain.
4
Address the presence of the copper intrauterine device (IUD).
The IUD should be left in place while initiating empiric antibiotics.
Evidence shows that early removal of an IUD does not improve clinical outcomes in acute PID. Removal is only indicated if there is no clinical improvement after 48-72 hours of appropriate antibiotic therapy.

Key Concept

Management of mild-to-moderate pelvic inflammatory disease in patients with an intrauterine device
Question 1764Question →

A 32-year-old woman with poorly controlled type 2 diabetes mellitus comes to the clinic reporting severe vulvovaginal burning and irritation that has persisted for the past 3 weeks. She has been treated with two separate courses of oral fluconazole and a 7-day course of over-the-counter topical miconazole with no relief. Her last hemoglobin A1c was 8.7%. Pelvic examination reveals significant vulvovaginal erythema and edema with a few superficial excoriations. There is a moderate amount of thin, whitish vaginal discharge. The vaginal pH is 4.3. Microscopic evaluation of the discharge with saline and 10% potassium hydroxide (KOH) preparations reveals numerous inflammatory cells and small budding yeasts, but no pseudohyphae are identified. Which of the following is the most appropriate next step in management?

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Answer: Obtain a vaginal fungal culture and initiate treatment with intravaginal boric acid

Answer

The most appropriate next step is to obtain a vaginal fungal culture and initiate treatment with intravaginal boric acid.
The correct answer involves obtaining a fungal culture and initiating intravaginal boric acid. This patient's presentation of severe vulvovaginal burning, a normal vaginal pH (< 4.5), and a KOH prep showing budding yeast without pseudohyphae is classic for a non-albicans Candida infection, most commonly Candida glabrata. Poorly controlled diabetes mellitus is a significant risk factor for C. glabrata. Unlike Candida albicans, which forms both budding yeast and pseudohyphae, C. glabrata typically only forms spores (budding yeast). Furthermore, C. glabrata frequently exhibits intrinsic resistance to standard azole therapies (e.g., fluconazole, miconazole). When a patient fails standard azole therapy and lacks pseudohyphae on microscopy, a fungal culture is required for definitive speciation, and treatment should be transitioned to intravaginal boric acid capsules or topical flucytosine for 14 days.

Step-by-Step Solution

1
Analyze the clinical history and physical exam findings.
The patient is a diabetic woman with refractory vulvovaginal burning, severe erythema, and a normal vaginal pH (4.3).
Establishes that the underlying condition is most likely a yeast infection, as bacterial vaginosis and trichomoniasis typically present with an elevated vaginal pH > 4.5.
2
Interpret the microscopic evaluation (KOH prep).
Microscopy shows small budding yeasts but NO pseudohyphae.
Differentiates Candida albicans (which consistently forms both budding yeast and pseudohyphae) from non-albicans species like Candida glabrata (which only forms budding yeast/spores).
3
Synthesize the treatment failure and microscopic findings to select the appropriate pharmacotherapy.
Identify that the patient has an azole-resistant C. glabrata infection requiring fungal culture for speciation and intravaginal boric acid for effective treatment.
Standard azoles (fluconazole, miconazole) are highly ineffective against C. glabrata due to intrinsic resistance; boric acid or topical flucytosine are the recommended first-line alternatives.

Key Concept

Diagnosis and management of non-albicans vulvovaginal candidiasis (Candida glabrata)
Question 1765Question →

A 4-month-old boy is brought to the emergency department due to progressive feeding difficulties, a weak cry, and rapid breathing. Over the past month, his parents noticed he becomes exhausted and sweaty during feeds. He smiles socially and coos interactively, but he has not yet been able to roll over or hold his head up. His temperature is 37.1°C (98.8°F), blood pressure is 85/50 mm Hg, pulse is 165/min, and respiratory rate is 65/min. Physical examination reveals a lethargic infant with a protruding tongue and generalized hypotonia. When pulled to a sitting position, he exhibits severe head lag. Deep tendon reflexes are absent. Lung auscultation reveals bilateral basilar crackles and scattered wheezes. The liver edge is palpated 4 cm below the right costal margin. A chest radiograph demonstrates massive cardiomegaly. Electrocardiography shows short PR intervals and large QRS complexes.

Laboratory studies show:
Arterial blood gas:
pH: 7.30
pCO2: 54 mm Hg
Bicarbonate: 26 mEq/L

Serum creatine kinase: 1,850 U/L (normal: 22-198 U/L)

Which of the following is the most likely underlying etiology of this patient's clinical presentation?

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Answer: Defective lysosomal degradation of glycogen

Answer

Defective lysosomal degradation of glycogen
This patient's presentation of profound hypotonia, macroglossia, hypertrophic cardiomyopathy (massive cardiomegaly, short PR intervals), and markedly elevated creatine kinase is the classic presentation of Pompe disease (glycogen storage disease type II). Pompe disease is an autosomal recessive disorder caused by a deficiency of lysosomal acid alpha-glucosidase (also known as acid maltase). This enzyme is responsible for the degradation of glycogen into glucose within lysosomes. Its deficiency leads to toxic accumulation of glycogen primarily within cardiac and skeletal muscle tissue. The resulting muscle weakness accounts for the profound hypotonia, failure to attain motor milestones, and respiratory hypoventilation leading to the acute respiratory acidosis seen on this patient's blood gas.

Step-by-Step Solution

1
Analyze the patient's neurological and developmental presentation.
The infant has profound generalized hypotonia, absent reflexes, and failure to reach motor milestones (head control, rolling over), while social and language milestones (smiling, cooing) remain perfectly normal for his age.
Differentiating between isolated motor weakness (myopathy or lower motor neuron disease) and global neurodevelopmental delay is critical.
2
Evaluate the cardiac and respiratory findings.
The patient has massive cardiomegaly, heart failure (crackles, hepatomegaly), and specific ECG changes (short PR, large QRS). The respiratory distress is accompanied by a primary respiratory acidosis (pH 7.30, elevated pCO2 54, normal bicarbonate 26).
Identifying hypertrophic cardiomyopathy combined with respiratory hypoventilation narrows the differential diagnosis significantly.
3
Synthesize the multisystem clinical picture with laboratory data.
The combination of a "floppy baby" with macroglossia, severe hypertrophic cardiomyopathy, elevated creatine kinase, and hypoventilation is the classic triad for Pompe disease.
This specific cluster of findings is pathognomonic for a specific inborn error of metabolism.
4
Identify the underlying molecular etiology of the identified syndrome.
Pompe disease is Glycogen Storage Disease type II, caused by a deficiency in lysosomal acid alpha-glucosidase (acid maltase), leading to defective lysosomal degradation of glycogen.
The question directly asks for the etiology corresponding to the clinical diagnosis.

Key Concept

Pompe disease (Glycogen storage disease type II) is a lysosomal storage disorder causing glycogen accumulation in cardiac and skeletal muscle, presenting in infancy with profound hypotonia, macroglossia, and severe hypertrophic cardiomyopathy.
Question 1766Question →

Match each clinical presentation of a third-trimester hepatic or hypertensive complication with its corresponding underlying pathophysiologic mechanism.

Click a left item, then click its matching right item

Items

A 3434-year-old woman at 3636 weeks gestation presents with jaundice, vomiting, and altered mental status. Blood pressure is 130/85 mmHg130/85\text{ mmHg}. Labs demonstrate an AST of 250 U/L250\text{ U/L}, platelets of 90,000/μL90,000/\mu L, glucose of 40 mg/dL40\text{ mg/dL}, and a prolonged prothrombin time.
A 2828-year-old woman at 3535 weeks gestation presents with severe epigastric pain. Blood pressure is 165/105 mmHg165/105\text{ mmHg}. Labs show an AST of 350 U/L350\text{ U/L}, platelets of 60,000/μL60,000/\mu L, normal glucose, normal prothrombin time, and schistocytes on a peripheral blood smear.
A 3030-year-old woman at 3737 weeks gestation presents with new-onset dyspnea, orthopnea, and bibasilar crackles. Blood pressure is 170/110 mmHg170/110\text{ mmHg}. Labs show normal liver transaminases, a normal metabolic panel, and a platelet count of 120,000/μL120,000/\mu L.
A 3232-year-old woman at 3838 weeks gestation presents with intolerable nocturnal pruritus predominantly affecting her palms and soles. Blood pressure is 120/80 mmHg120/80\text{ mmHg}. Labs reveal normal hepatic transaminases, normal platelets, and significantly elevated total serum bile acids.

Matches

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Answer

The correct matching pairs clinical vignettes of severe obstetric complications to their distinct pathophysiologic mechanisms: the hypoglycemic and coagulopathic patient to microvesicular steatosis (AFLP), the patient with schistocytes and severe hypertension to microvascular endothelial damage (HELLP), the dyspneic patient with severe hypertension to increased capillary permeability (Preeclampsia with pulmonary edema), and the normotensive patient with pruritus to impaired biliary clearance (ICP).
The question requires differentiating the distinct pathophysiologic mechanisms of late-pregnancy hepatic and hypertensive complications based on targeted clinical and laboratory findings. AFLP is uniquely characterized by synthetic liver failure (hypoglycemia, coagulopathy). HELLP syndrome is driven by endothelial injury causing hemolysis and thrombocytopenia with preserved synthetic function. Severe preeclampsia can cause pulmonary edema via increased vascular permeability and afterload. ICP presents with isolated bile acid clearance issues without significant hypertension or hepatic necrosis.

Step-by-Step Solution

1
Analyze the first vignette for differentiating features of hepatic dysfunction in pregnancy.
Acute Fatty Liver of Pregnancy (AFLP) is identified.
The combination of profound hypoglycemia and coagulopathy (prolonged PT) points to synthetic liver failure, which differentiates AFLP from HELLP syndrome.
2
Evaluate the second vignette concerning severe epigastric pain, severe hypertension, and schistocytes.
HELLP syndrome is identified.
Schistocytes on a blood smear indicate microangiopathic hemolytic anemia. Combined with thrombocytopenia and preserved synthetic liver function, this confirms HELLP rather than AFLP.
3
Assess the third vignette detailing dyspnea, crackles, and severe hypertension.
Preeclampsia complicated by acute pulmonary edema is diagnosed.
The absence of liver enzyme elevation rules out HELLP/AFLP, while severe hypertension and respiratory compromise point to endothelial damage leading to capillary leak and alveolar transudation.
4
Interpret the fourth vignette featuring isolated palmar/plantar pruritus and elevated bile acids.
Intrahepatic Cholestasis of Pregnancy (ICP) is confirmed.
Normal blood pressure and isolated biliary clearance issues (elevated bile acids without hepatocellular necrosis) precisely describe ICP.

Key Concept

Differentiating third-trimester hepatic and hypertensive complications by their unique clinical and pathophysiologic signatures.
Question 1767Question →

Match each intrapartum fetal heart rate pattern to its most likely underlying physiological etiology.

Click a left item, then click its matching right item

Items

Early deceleration
Late deceleration
Variable deceleration
Sinusoidal pattern

Matches

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Answer

Early deceleration corresponds to fetal head compression, late deceleration to uteroplacental insufficiency, variable deceleration to umbilical cord compression, and sinusoidal pattern to severe fetal anemia.
Each fetal heart rate pattern is tightly linked to a specific pathophysiological event. The 'VEAL CHOP' mnemonic correctly maps these relationships: Variable decelerations to Cord compression, Early decelerations to Head compression, Accelerations to Okay (normal oxygenation), and Late decelerations to Placental insufficiency. Additionally, a sinusoidal pattern uniquely indicates severe fetal anemia.

Step-by-Step Solution

1
Identify the underlying cause of early decelerations.
Early decelerations map to fetal head compression.
Head compression during a uterine contraction increases vagal tone, causing a benign, symmetric drop in fetal heart rate that mirrors the contraction.
2
Identify the underlying cause of late decelerations.
Late decelerations map to uteroplacental insufficiency.
Decreased oxygen delivery to the fetus during a contraction leads to a delayed heart rate drop that begins after the contraction peaks.
3
Identify the underlying cause of variable decelerations.
Variable decelerations map to umbilical cord compression.
Compression of the umbilical cord (e.g., from oligohydramnios or cord prolapse) causes an abrupt increase in fetal blood pressure, triggering a baroreceptor-mediated abrupt drop in heart rate.
4
Identify the underlying cause of a sinusoidal fetal heart rate pattern.
A sinusoidal pattern maps to severe fetal anemia.
Severe hypoxia or anemia (e.g., from vasa previa, alloimmunization) abolishes normal autonomic control, resulting in a smooth, undulating baseline.

Key Concept

Fetal heart rate monitoring patterns and their underlying etiologies
Estimated Time:45s
Question 1768Question →

A 35-year-old woman, gravida 4, para 3, at 39 weeks gestation is admitted to the labor and delivery unit for labor induction due to diet-controlled gestational diabetes mellitus. Oxytocin augmentation is ongoing. Epidural anesthesia was administered two hours ago. Her current cervical dilation is 8 cm8\text{ cm}. She suddenly becomes extremely anxious and reports severe shortness of breath. Moments later, she becomes obtunded. Her blood pressure is 60/40 mmHg60/40\text{ mmHg}, pulse is 135 /min135\text{ /min}, and respiratory rate is 28 /min28\text{ /min}. Pulse oximetry shows an oxygen saturation of 78%78\% on room air. The nursing staff notes continuous oozing of dark blood from the patient's peripheral intravenous catheter site. The continuous fetal heart rate monitor, which previously showed a Category I tracing, now demonstrates a sudden, prolonged deceleration to 60 /min60\text{ /min} with absent variability.

Which of the following is the most appropriate initial step in management?

Show answer & explanation

Answer: Endotracheal intubation and mechanical ventilation

Answer

The most appropriate initial step in management is endotracheal intubation and mechanical ventilation.
The correct answer is endotracheal intubation and mechanical ventilation. This patient is presenting with the classic triad of amniotic fluid embolism (AFE): sudden hypoxemic respiratory failure, cardiogenic shock (hypotension), and disseminated intravascular coagulation (DIC). AFE often occurs during active labor or immediately postpartum. Despite the alarming fetal heart rate tracing (prolonged deceleration), maternal resuscitation—starting with Airway and Breathing—must always take precedence. Securing the airway with endotracheal intubation is the critical first step for an obtunded patient with an oxygen saturation of 78%78\%. Once the airway is secured, the team can focus on circulatory support (vasopressors, massive transfusion) and potential emergent delivery.

Step-by-Step Solution

1
Evaluate maternal clinical stability and vital signs.
The patient is obtunded with severe hypoxia (78%78\%), profound hypotension (60/40 mmHg60/40\text{ mmHg}), and signs of coagulopathy (oozing from IV site).
Identifying the severity of the maternal condition dictates the immediate triage priority over fetal concerns.
2
Identify the etiology of the sudden clinical deterioration.
The acute triad of hypoxemic respiratory failure, cardiogenic shock, and disseminated intravascular coagulation (DIC) during active labor indicates an amniotic fluid embolism (AFE).
Recognizing AFE is critical because it requires immediate, aggressive multidisciplinary resuscitation.
3
Select the definitive next best step based on resuscitation protocols.
Despite the fetal prolonged deceleration, the airway must be secured first.
In any obstetric emergency involving maternal cardiopulmonary collapse, stabilizing maternal ABCs (Airway, Breathing, Circulation) takes absolute precedence over emergent fetal delivery.

Key Concept

In the management of amniotic fluid embolism (anaphylactoid syndrome of pregnancy), maternal stabilization (ABCs, starting with intubation for severe hypoxia) must precede emergency cesarean delivery, despite the presence of fetal distress.
Question 1769Question →

A patient, gravida 3, para 2, is brought to the obstetrical triage unit at 37 weeks and 5 days of gestation due to the sudden onset of constant, agonizing lower abdominal pain and vaginal bleeding. Her medical history is significant for poorly controlled chronic hypertension and daily tobacco use. Vital signs show a temperature of 37.1°C (98.8°F), blood pressure of 168/110 mm Hg, and a heart rate of 115/min. On physical examination, the uterine fundus is rigid and exquisitely tender to light palpation; it does not relax between perceived contractions. Dark red blood is noted at the vaginal introitus. A prior third-trimester ultrasound documented an anterior, high-lying placenta. Sterile vaginal examination demonstrates the cervix is 2 cm dilated and 50% effaced, with the fetal vertex at a -2 station. Continuous fetal monitoring displays a baseline heart rate of 165/min, undetectable variability, and repetitive late decelerations following every contraction. The tocodynamometer indicates low-amplitude, high-frequency contractions occurring every 1 to 2 minutes. Which of the following represents the most appropriate next step in the management of this patient?

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Answer: Preparation for immediate surgical delivery of the fetus

Answer

Preparation for immediate surgical delivery of the fetus
The patient's clinical presentation of sudden-onset severe abdominal pain, dark vaginal bleeding, a rigid and hypertonic uterus, and maternal hypertension is highly characteristic of placental abruption. The associated fetal heart rate monitoring reveals absent variability with recurrent late decelerations, classifying it as a Category III tracing. A Category III tracing is highly predictive of abnormal fetal acid-base status and indicates impending fetal asphyxia. Because the patient's cervix is unfavorable for an immediate vaginal delivery (2 cm dilated, -2 station), emergency laparotomy and cesarean delivery is the required definitive management to prevent fetal demise and control the ongoing maternal hemorrhage.

Step-by-Step Solution

1
Evaluate the maternal clinical presentation.
The patient exhibits sudden-onset severe abdominal pain, vaginal bleeding, a rigid and hypertonic uterus, and has risk factors for placental abruption (hypertension, tobacco use).
Identifying the classic triad of abruption is critical for recognizing this obstetric emergency.
2
Interpret the continuous fetal heart rate monitoring tracing.
The tracing shows absent baseline variability combined with recurrent late decelerations, which meets the criteria for a Category III fetal heart rate tracing.
A Category III tracing indicates severe fetal acidemia and impending fetal demise, necessitating immediate intervention.
3
Determine the appropriate intervention based on maternal and fetal status.
Given the Category III tracing and an unfavorable cervical exam (2 cm dilated) that precludes immediate vaginal delivery, emergency cesarean delivery is required.
Expedited surgical delivery is the only definitive treatment to prevent fetal mortality and manage maternal hemorrhage from the abruption.

Key Concept

Management of placental abruption with a Category III fetal heart rate tracing
Estimated Time:1m 15s
Question 1770Question →

A 3131-year-old woman, gravida 33, para 22, presents to the obstetrics clinic at 2323 weeks gestation for a scheduled evaluation. She reports new-onset, brief, sharp, pulling pains in the bilateral lower quadrants of her abdomen. The pain occurs primarily when she stands up quickly from a seated position and resolves within a few seconds. She denies vaginal bleeding, dysuria, or regular uterine contractions. Her blood pressure is 110/66110/66 mm Hg, pulse is 8686/min, and respirations are 1616/min. Abdominal examination reveals a soft uterus with fundal height corresponding to 2323 cm. There is mild tenderness to palpation over the lateral borders of the uterus, but no guarding or rebound tenderness. Laboratory results obtained two days ago for an employer-sponsored health screening reveal the following:

Serum sodium: 131131 mEq/L
Serum creatinine: 0.50.5 mg/dL
Alkaline phosphatase (ALP): 245245 U/L
Aspartate aminotransferase (AST): 2222 U/L

Urinalysis:
Specific gravity: 1.0141.014
Glucose: 2+2+
Protein: Trace
Leukocyte esterase: Negative
Nitrites: Negative
Microscopy: 1−21-2 WBCs/hpf

Based on these clinical and laboratory findings, which of the following is the most appropriate next step in management?

Show answer & explanation

Answer: Recommend a maternity support garment and routine follow-up

Answer

Recommend a maternity support garment and routine follow-up
The patient's clinical presentation is consistent with round ligament pain, a normal physiologic consequence of the rapidly stretching uterus in the second trimester. It is classically characterized by brief, sharp, lower abdominal pain exacerbated by sudden movements. Conservative management with a maternity support garment and reassurance is the appropriate next step. Furthermore, her laboratory findings (mild hyponatremia, decreased creatinine, elevated alkaline phosphatase, trace proteinuria, and glucosuria) entirely reflect expected physiologic adaptations to pregnancy rather than underlying pathology. Consequently, no directed medical interventions or alterations to her routine prenatal care schedule are indicated.

Step-by-Step Solution

1
Analyze the patient's abdominal pain.
The brief, sharp pain provoked by sudden movement is classic for round ligament pain.
It is critical to differentiate physiologic musculoskeletal pain from obstetric emergencies such as placental abruption or preterm labor.
2
Evaluate the comprehensive metabolic panel findings.
Sodium of 131 mEq/L, Creatinine of 0.5 mg/dL, and elevated ALP are all identified as normal physiologic adaptations.
Pregnancy causes reset osmostats, increased GFR, and placental ALP production, which commonly mimic pathologic lab values.
3
Assess the urinalysis results.
Trace protein and 2+ glucose are normal due to increased GFR exceeding tubular reabsorption maximums; the absence of leukocyte esterase and nitrites rules out a urinary tract infection.
Determining if the urinalysis warrants early GDM screening, preeclampsia workup, or antibiotics.
4
Determine the appropriate management plan.
Conservative management for the pain and adherence to the routine prenatal schedule is indicated.
No pathologic processes are present to warrant early screening, imaging, or medical therapy.

Key Concept

Physiologic maternal adaptations to pregnancy
Estimated Time:1m 30s
Question 1771Question →

An expectant mother in her first pregnancy presents to the clinic at 24 weeks of gestation for a scheduled prenatal evaluation. She reports feeling generally well but notes mild fatigue and bilateral ankle swelling after long shifts at her retail job. She takes a standard daily prenatal vitamin. Vital signs show a blood pressure of 112/68 mm Hg112/68 \text{ mm Hg}, pulse of 82/min82/\text{min}, and respiratory rate of 16/min16/\text{min}. Physical examination reveals trace bilateral pedal edema but is otherwise unremarkable. Laboratory studies return the following results:

Laboratory ParameterPatient Result
Hemoglobin10.7 g/dL10.7 \text{ g/dL}
Hematocrit32.5%32.5\%
Mean corpuscular volume89 fL89 \text{ fL}
Leukocyte count11,500/mm311,500/\text{mm}^3
Platelet count220,000/mm3220,000/\text{mm}^3

Which of the following is the most appropriate action regarding these laboratory findings?

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Answer: Maintain current standard of care with no additional hematologic testing

Answer

Maintain current standard of care with no additional hematologic testing
The correct approach is to maintain the current standard of care. This patient is at 24 weeks of gestation (the second trimester) and has a hemoglobin concentration of 10.7 g/dL10.7 \text{ g/dL}. During a normal pregnancy, maternal plasma volume expands by approximately 40% to 50%, while the total red blood cell mass increases by only 20% to 30%. This disproportionate expansion creates a dilutional effect, leading to physiologic anemia. To account for this, the American College of Obstetricians and Gynecologists (ACOG) defines anemia in pregnancy using lower hemoglobin cutoffs: <11.0 g/dL< 11.0 \text{ g/dL} in the first and third trimesters, and <10.5 g/dL< 10.5 \text{ g/dL} in the second trimester. Because this patient's hemoglobin is greater than 10.5 g/dL10.5 \text{ g/dL}, she does not have clinical anemia. Furthermore, her mild leukocytosis (11,500/mm311,500/\text{mm}^3) and trace pedal edema are normal adaptations to pregnancy. Therefore, reassurance and continuation of routine prenatal vitamins are sufficient.

Step-by-Step Solution

1
Identify the patient's current gestational age and relevant laboratory parameters.
The patient is at 24 weeks of gestation (second trimester) with a hemoglobin of 10.7 g/dL.
Gestational age determines the specific physiologic thresholds for expected laboratory changes during pregnancy.
2
Compare the patient's hemoglobin level to trimester-specific diagnostic thresholds for true anemia.
The lower limit of normal hemoglobin is 11.0 g/dL in the first and third trimesters, and 10.5 g/dL in the second trimester. The patient's hemoglobin (10.7 g/dL) is strictly within normal limits for her trimester.
Applying the correct threshold differentiates between true pathologic anemia (usually iron deficiency) and normal physiologic dilutional anemia.
3
Determine the appropriate clinical management based on the findings.
Since all laboratory findings (including mild leukocytosis) are normal adaptations to pregnancy, no further intervention is needed.
Unnecessary diagnostic testing and supplementation should be avoided in healthy pregnancies exhibiting normal physiologic adaptations.

Key Concept

Physiologic dilutional anemia in pregnancy and trimester-specific hemoglobin thresholds.
Question 1772Question →

A series of pregnant patients present to the labor and delivery unit, and their continuous fetal heart rate (FHR) tracings are evaluated. Based on the clinical presentation and tracing characteristics, match each intrapartum scenario with its most likely underlying pathophysiology.

Click a left item, then click its matching right item

Items

A smooth, sine wave-like FHR baseline with a frequency of 3 to 5 cycles per minute and absent variability, presenting immediately following artificial rupture of membranes.
Recurrent, abrupt decreases in FHR (drop of ≥ 15 bpm lasting ≥ 15 seconds) that vary in onset, depth, and duration relative to uterine contractions in a patient with oligohydramnios.
Recurrent, gradual decreases in FHR with the nadir occurring consistently after the peak of the contraction, in a patient presenting with a rigid, tender uterus and dark vaginal bleeding.
A baseline FHR of 175 bpm with minimal variability in a patient with prolonged rupture of membranes and a maternal temperature of 39.0°C (102.2°F).

Matches

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Answer

The correct matches are: L1 matches R1 (fetal anemia); L2 matches R2 (cord compression); L3 matches R3 (uteroplacental insufficiency); L4 matches R4 (intra-amniotic infection). R5 is the unmatched distractor.
Each specific FHR abnormality directly correlates with a distinct pathophysiologic mechanism. A sinusoidal pattern indicates severe fetal anemia (often from vasa previa). Variable decelerations indicate cord compression. Late decelerations point to uteroplacental insufficiency (often from placental abruption). Fetal tachycardia in a febrile mother points to intra-amniotic infection.

Step-by-Step Solution

1
Evaluate the FHR tracing and clinical context in the first scenario (smooth sine wave pattern).
Identify this as a sinusoidal pattern associated with membrane rupture.
A sinusoidal pattern indicates severe fetal anemia/hypoxia, classically occurring with fetal hemorrhage from ruptured vasa previa.
2
Analyze the FHR tracing in the second scenario (abrupt, recurrent drops in FHR).
Identify these as variable decelerations.
Variable decelerations are caused by umbilical cord compression, which is highly prevalent in patients with decreased amniotic fluid (oligohydramnios).
3
Assess the FHR tracing in the third scenario (gradual FHR drops with delayed nadir).
Identify these as late decelerations in the setting of placental abruption.
Late decelerations reflect transient fetal hypoxemia caused by uteroplacental insufficiency, which perfectly aligns with the clinical signs of a rigid, tender uterus.
4
Evaluate the FHR baseline in the fourth scenario (baseline FHR 175 bpm).
Identify this as fetal tachycardia in a febrile patient.
Prolonged rupture of membranes and maternal fever causing fetal tachycardia point directly to an intra-amniotic infection.

Key Concept

Integration of classic fetal heart rate (FHR) tracing abnormalities with maternal clinical signs to accurately diagnose underlying intrapartum obstetric complications.
Estimated Time:2m 0s
Question 1773Question →

A 23-year-old woman comes to the outpatient clinic for a follow-up visit. Two weeks ago, she was evaluated in the emergency department after ingesting a handful of acetaminophen tablets following a brief but intense argument with her new boyfriend. She reports a history of multiple intense and short-lived relationships, frequent feelings of profound emptiness, and sudden outbursts of extreme anger. During the interview, she tells the physician, "You are the only person who has ever truly cared about me; all my previous doctors were completely useless." She is medically stable, denies any active suicidal ideation or intent, and expresses a desire to improve her coping skills. She has no history of manic episodes or psychosis. Which of the following is the most appropriate next step in the long-term management of this patient?

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Answer: Referral for dialectical behavior therapy

Answer

Referral for dialectical behavior therapy
The patient's presentation of a recent suicidal gesture, unstable relationships, chronic emptiness, difficulty controlling anger, and the use of splitting defense mechanisms strongly indicates borderline personality disorder (BPD). The most effective, evidence-based, first-line long-term treatment for BPD is dialectical behavior therapy (DBT).

Step-by-Step Solution

1
Identify the patient's primary diagnosis based on the clinical vignette.
The patient exhibits classic signs of borderline personality disorder (BPD).
She displays a history of unstable relationships, suicidal gestures (acetaminophen overdose), chronic feelings of emptiness, extreme anger, and idealization/devaluation (splitting, as seen in her comments about the physician vs. previous doctors).
2
Determine the standard first-line management for borderline personality disorder.
Psychotherapy, specifically dialectical behavior therapy (DBT), is the established first-line treatment.
DBT focuses on teaching emotional regulation, distress tolerance, mindfulness, and interpersonal effectiveness, which directly address the core deficits in BPD.
3
Evaluate alternative management options for safety and ethical adherence.
Pharmacotherapy and boundary-breaching actions are ruled out.
Polypharmacy with contraindicated drugs risks serotonin syndrome. Furthermore, bypassing the patient's autonomy or breaching confidentiality without an imminent threat violates core medical ethics and disrupts the crucial therapeutic boundaries needed for BPD patients.

Key Concept

The diagnosis of borderline personality disorder and its first-line management with dialectical behavior therapy, while maintaining strict ethical boundaries regarding confidentiality and patient autonomy.
Estimated Time:1m 15s
Question 1774Question →

A 25-year-old man is brought to the outpatient clinic by his sister, who is concerned about his profound social isolation. For the past 6 years, the patient has lived alone and worked as a night-shift security guard specifically to avoid interacting with others. He reports that he prefers to be alone because he feels "uncomfortable and suspicious" around people, believing they are secretly judging his aura. He has a long-standing belief in telepathy and claims he can occasionally predict the future through his dreams, although he denies ever hearing voices or seeing things that are not there. During the interview, he displays restricted affect and wears a heavy winter coat lined with aluminum foil, despite it being a warm summer day. His speech is vague and overly elaborate but remains logically connected. He has never been hospitalized and has maintained his employment. Which of the following is the most likely diagnosis?

Show answer & explanation

Answer: Schizotypal personality disorder

Answer

Schizotypal personality disorder
The correct diagnosis is Schizotypal personality disorder. This condition is a Cluster A (odd/eccentric) personality disorder characterized by a pervasive pattern of social and interpersonal deficits, marked by acute discomfort with close relationships, as well as cognitive or perceptual distortions and eccentricities of behavior. This patient's magical thinking (telepathy, predicting the future), odd appearance (foil-lined coat), suspiciousness, and social anxiety are classic features. Crucially, while these patients exhibit odd thoughts, they do not experience frank hallucinations or true fixed delusions, separating their condition from schizophrenia.

Step-by-Step Solution

1
Analyze the patient's presenting symptoms and timeline.
The patient has a 6-year history of social isolation, odd beliefs (telepathy, predicting the future), suspiciousness, and eccentric appearance (foil-lined coat).
Identifying the nature and chronicity of the symptoms is required to differentiate between personality disorders and acute psychotic illnesses.
2
Evaluate for the presence of frank psychotic symptoms.
The patient explicitly denies auditory or visual hallucinations and does not have fixed, false delusions (his thoughts are odd and magical, but do not meet the threshold for frank psychosis).
The absence of active-phase psychotic symptoms rules out primary psychotic disorders like schizophrenia or schizophreniform disorder.
3
Synthesize the findings to formulate a diagnosis.
A chronic, lifelong pattern of acute discomfort in close relationships, cognitive or perceptual distortions (magical thinking), and eccentricities of behavior points directly to a Cluster A personality disorder.
Schizotypal personality disorder perfectly encompasses the combination of odd behavior, magical thinking, and interpersonal deficits present in this patient.

Key Concept

Schizotypal personality disorder is characterized by a lifelong pattern of social and interpersonal deficits, cognitive or perceptual distortions (such as magical thinking and odd beliefs), and eccentric behavior, without the frank delusions or hallucinations seen in schizophrenia.
Estimated Time:1m 0s
Question 1775Question →

A 34-year-old woman comes to the outpatient psychiatry clinic reporting that she "cannot get out of bed" and feels completely hopeless. Over the past 6 weeks, she has experienced a persistently depressed mood, slept 14 hours a day, gained 4.5 kg (10 lb), and suffered from profound fatigue. She admits to passive suicidal ideation but denies any active plan. Her past psychiatric history is notable for a major depressive episode at age 22, for which she was prescribed paroxetine. Three weeks after starting paroxetine, she developed a severely elevated mood, rapid and pressured speech, decreased need for sleep (2 hours per night), and grandiose delusions resulting in psychiatric hospitalization. She was stabilized on a medication that she discontinued 5 years ago because she "felt fine." Her medical history includes type 2 diabetes mellitus, hypertension, and osteoarthritis. Current medications are metformin, lisinopril, hydrochlorothiazide, and daily ibuprofen. Her vital signs show a blood pressure of 145/90 mmHg. Her BMI is 38 kg/m². Laboratory studies reveal a hemoglobin A1c of 9.2%. Mental status examination shows marked psychomotor retardation, a flattened affect, and a depressed mood. Which of the following is the most appropriate next step in pharmacotherapy for this patient's current psychiatric symptoms?

Show answer & explanation

Answer: Initiate lurasidone

Answer

Initiate lurasidone
The patient's history of a manic episode (hospitalization, grandiose delusions, decreased need for sleep) following paroxetine use indicates a definitive diagnosis of Bipolar I disorder. She is currently experiencing a severe, acute bipolar depressive episode. The primary goal of pharmacotherapy is to treat the depression without precipitating a manic switch, while minimizing adverse effects given her severe medical comorbidities. Lurasidone is an atypical antipsychotic FDA-approved for acute bipolar depression. Crucially, it has a highly favorable metabolic profile (weight and lipid neutral), making it the safest and most effective choice for a patient with severe obesity and uncontrolled type 2 diabetes (HbA1c 9.2%). Furthermore, it does not have severe pharmacokinetic interactions with her antihypertensives or NSAIDs.

Step-by-Step Solution

1
Diagnose the underlying psychiatric disorder based on past history.
Bipolar I disorder, currently in a severe major depressive episode.
The history of hospitalization for mania (grandiose delusions, decreased need for sleep) triggered by paroxetine confirms Bipolar I disorder, not recurrent major depressive disorder.
2
Identify appropriate medication classes for acute bipolar depression.
Options include lurasidone, quetiapine, cariprazine, olanzapine-fluoxetine, or lithium.
Standard antidepressant monotherapies (SSRIs, SNRIs) must be explicitly avoided due to the high risk of precipitating a manic switch.
3
Evaluate the safety of lithium given the patient's current medication list.
Lithium is unsafe and highly contraindicated in this specific clinical context.
The concurrent use of ACE inhibitors (lisinopril), thiazide diuretics (hydrochlorothiazide), and NSAIDs (ibuprofen) drastically reduces renal lithium clearance, placing the patient at immediate risk for severe lithium toxicity.
4
Evaluate the remaining atypical antipsychotics against the patient's medical comorbidities.
Lurasidone is the most appropriate and optimal choice.
Olanzapine-fluoxetine and quetiapine have high metabolic liabilities and would exacerbate her uncontrolled type 2 diabetes (HbA1c 9.2%) and severe obesity. Lurasidone is metabolically neutral.

Key Concept

Pharmacologic management of acute bipolar depression in patients with complex medical comorbidities and polypharmacy.
Question 1776Question →

A 32-year-old woman, gravida 4, para 4, has an uncomplicated vaginal delivery of a 4200 g (9 lb 4 oz) neonate. Ten minutes later, the placenta is delivered intact. Shortly after, she develops heavy, continuous vaginal bleeding. Her blood pressure drops to 90/50 mm Hg, and her heart rate increases to 115/min. Abdominal examination reveals a soft, boggy uterus palpated 2 cm above the umbilicus. Two large-bore intravenous lines are placed, and aggressive fluid resuscitation is initiated. Arrange the following interventions for the management of this patient's hemorrhage in the most appropriate chronological sequence, assuming the bleeding persists despite each preceding step.

Drag items to arrange them in the correct order

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Answer

The correct escalation sequence is: 1) Bimanual massage and oxytocin, 2) Secondary uterotonics, 3) Intrauterine balloon tamponade, 4) Laparotomy with compression sutures, 5) Hysterectomy.
The management of postpartum hemorrhage secondary to uterine atony follows a strict stepwise escalation protocol designed to minimize maternal morbidity and preserve fertility whenever possible. The first line of treatment is bimanual uterine massage combined with continuous intravenous oxytocin. If this is insufficient, secondary uterotonic agents (such as methylergonovine, carboprost, and/or misoprostol) are administered. If medical management fails, the next appropriate step is mechanical tamponade using an intrauterine balloon (e.g., Bakri balloon) to exert outward pressure on the uterine walls. Continued bleeding despite optimal medical therapy and tamponade necessitates surgical intervention. Exploratory laparotomy should begin with fertility-sparing techniques, such as the placement of uterine compression sutures (e.g., B-Lynch) or uterine artery ligation. If all these conservative measures fail to achieve hemostasis and the patient remains hemodynamically unstable, a total abdominal hysterectomy is the definitive, life-saving procedure of last resort.

Step-by-Step Solution

1
Identify the primary cause of the postpartum hemorrhage.
The patient has a soft, boggy uterus after delivering a macrosomic infant, which indicates uterine atony.
Uterine atony is the most common cause of postpartum hemorrhage, and its identification dictates the management algorithm.
2
Determine the first-line non-invasive management.
Initiate bimanual massage and oxytocin.
Initial management always begins with the least invasive, most rapid mechanical and medical stimulation of the myometrium.
3
Determine the second-line pharmacological management.
Administer secondary uterotonics (e.g., methylergonovine, carboprost, misoprostol).
This is required when first-line medical therapies are insufficient to achieve firm uterine tone.
4
Determine the minimally invasive mechanical intervention.
Place an intrauterine balloon tamponade.
This acts as a bridging therapy that applies direct internal pressure before resorting to major surgery.
5
Determine the escalation sequence for surgical management.
Attempt uterine compression sutures first, followed by hysterectomy if failure occurs.
Fertility-sparing surgery must always be attempted before definitive, irreversible hysterectomy.

Key Concept

Stepwise escalation in the management of postpartum hemorrhage secondary to uterine atony.
Question 1777Question →

Match each patient's clinical profile with the most appropriate contraceptive method based on the World Health Organization Medical Eligibility Criteria (WHO MEC).

Click a left item, then click its matching right item

Items

37-year-old woman who smokes 1.5 packs of cigarettes daily and specifically requests an oral contraceptive method.
28-year-old woman with Wilson disease who desires a highly effective, intrauterine contraceptive method.
22-year-old woman being treated for acute pelvic inflammatory disease who desires a highly effective, non-daily, reversible contraceptive.
34-year-old woman with a history of estrogen-receptor positive breast cancer treated 3 years ago who desires a long-acting reversible contraceptive.

Matches

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Answer

1 matches with Progestin-only oral pill; 2 matches with Levonorgestrel-releasing intrauterine device; 3 matches with Etonogestrel subdermal implant; 4 matches with Copper intrauterine device.
Each patient's clinical profile presents a specific absolute contraindication (WHO MEC Category 4) that eliminates certain contraceptive options, leaving a unique, safe, and highly effective choice that meets their stated preferences.

Step-by-Step Solution

1
Identify the absolute contraindication (WHO MEC Category 4) for the 37-year-old heavy smoker seeking an oral method.
Estrogen-containing combined oral contraceptives are contraindicated.
There is an unacceptably high risk of thromboembolism and myocardial infarction. A progestin-only pill is the safest oral option.
2
Identify the absolute contraindication for the patient with Wilson disease seeking an intrauterine method.
The copper IUD is contraindicated.
Wilson disease prevents normal copper excretion. The LNG-IUD is a safe intrauterine alternative.
3
Identify the absolute contraindication for the patient with active PID seeking a non-daily method.
All IUD insertions are contraindicated.
Inserting an IUD during active PID can worsen the infection. The etonogestrel implant is a safe, non-daily alternative.
4
Identify the absolute contraindication for the patient with a history of breast cancer seeking a long-acting method.
All hormonal contraceptives are contraindicated.
Breast cancer is hormonally sensitive. The hormone-free copper IUD is the safest highly effective long-acting choice.

Key Concept

Selecting appropriate contraceptive methods requires recognizing WHO Medical Eligibility Criteria (MEC) Category 4 (absolute) contraindications, such as avoiding estrogen in older smokers, avoiding copper IUDs in Wilson disease, avoiding IUD insertions during active PID, and avoiding all systemic hormones in breast cancer patients.
Estimated Time:1m 30s
Question 1778Question →

A 25-year-old man presents to the outpatient clinic with a 2-month history of sudden, unpredictable episodes of intense fear accompanied by palpitations, sweating, shortness of breath, and a feeling of impending doom. The episodes typically reach their peak severity within 10 minutes. Because of these episodes, the patient has become increasingly fearful of leaving his house. He has a past medical history of bipolar I disorder, which was diagnosed three years ago, but he stopped taking his mood stabilizer 6 months ago. His vital signs are within normal limits. Physical examination, electrocardiogram, and basic metabolic panel are unremarkable. Which of the following is the most appropriate initial long-term management for this patient's current condition?

Show answer & explanation

Answer: Cognitive-behavioral therapy

Answer

Cognitive-behavioral therapy is the most appropriate initial long-term management.
This patient is presenting with classic symptoms of panic disorder with agoraphobia, characterized by recurrent, unexpected panic attacks and a subsequent fear of future attacks leading to avoidance behaviors. Cognitive-behavioral therapy (CBT) is a highly effective, first-line treatment for panic disorder. In a patient with an unmedicated history of bipolar I disorder, CBT is particularly appropriate as it avoids the major risk of pharmacologically precipitating a manic episode.

Step-by-Step Solution

1
Identify the primary psychiatric diagnosis based on the clinical presentation.
The patient has a 2-month history of unexpected panic attacks and subsequent agoraphobia, leading to a diagnosis of Panic Disorder.
Establishing the correct diagnosis is required to determine the appropriate first-line treatment options.
2
Consider the patient's past medical history and its impact on treatment selection.
The patient has a history of Bipolar I disorder and is currently unmedicated.
Certain standard pharmacological treatments for anxiety, specifically SSRIs, can cause severe adverse effects such as a manic switch in patients with unmedicated bipolar disorder.
3
Select the safest and most effective initial treatment.
Cognitive-behavioral therapy is chosen because it is a first-line treatment for panic disorder and safely avoids the pharmacological risks associated with antidepressants in this specific patient.
It addresses the core symptoms of panic and agoraphobia effectively without destabilizing the patient's underlying mood disorder.

Key Concept

In patients with a history of unmedicated bipolar disorder presenting with panic disorder, cognitive-behavioral therapy is the safest first-line treatment, as antidepressant monotherapy risks precipitating a manic episode.
Question 1779Question →

A 34-year-old man presents via telehealth for a follow-up visit. Over the past four weeks, he has experienced persistent low mood, hypersomnia, extreme fatigue, and a loss of interest in his usual activities. Five years ago, he was hospitalized for an episode characterized by grandiosity, pressured speech, and a significantly decreased need for sleep. He has not taken any medications for the past six months. Which of the following are appropriate pharmacological treatments for this patient's current condition? (Select all that apply)

Select all that apply

Show answer & explanation

Answer: Quetiapine; Lurasidone; Olanzapine and fluoxetine combination

Answer

The correct treatments are quetiapine, lurasidone, and the olanzapine and fluoxetine combination.
The patient's history of a manic episode requiring hospitalization confirms a diagnosis of bipolar I disorder. He is currently presenting with an acute bipolar depressive episode. The goal of treatment is to alleviate depressive symptoms without inducing a manic switch. Quetiapine, lurasidone, and the olanzapine-fluoxetine combination are all first-line, FDA-approved treatments for acute bipolar depression. They provide both mood-stabilizing and antidepressant effects.

Step-by-Step Solution

1
Diagnose the patient's underlying psychiatric disorder based on his history.
The patient has a history of an episode featuring grandiosity, pressured speech, and decreased need for sleep leading to hospitalization, which defines a manic episode. Therefore, his overarching diagnosis is bipolar I disorder.
Accurate diagnosis of bipolar disorder is necessary because depressive episodes in bipolar disorder must be treated differently than unipolar major depressive disorder.
2
Identify the patient's current clinical state.
The patient is currently experiencing a major depressive episode (low mood, hypersomnia, fatigue, anhedonia).
Treatment selection depends on the current phase of bipolar disorder (e.g., acute mania, acute depression, or maintenance).
3
Select appropriate pharmacotherapy for acute bipolar depression.
Appropriate options include quetiapine, lurasidone, or the olanzapine-fluoxetine combination. Antidepressant monotherapy must be avoided.
Antidepressant monotherapy can precipitate a manic switch in patients with bipolar disorder.

Key Concept

Acute depressive episodes in bipolar I disorder should be treated with specific second-generation antipsychotics (e.g., quetiapine, lurasidone) or combinations (e.g., olanzapine-fluoxetine) rather than antidepressant monotherapy, which carries a high risk of inducing mania.
Question 1780Question →

Match each clinical presentation of a breast disorder to its most likely corresponding histopathological finding on core needle biopsy.

Click a left item, then click its matching right item

Items

A 42-year-old woman presents with a 2-cm firm, irregular breast mass and skin retraction. She had a reduction mammoplasty 2 years ago. Mammography shows a spiculated mass with coarse calcifications.
A 54-year-old woman presents with a 6-cm firm, mobile, well-circumscribed breast mass that has doubled in size over the last 3 months.
A 38-year-old woman presents with spontaneous, unilateral, bloody nipple discharge. Examination reveals no palpable breast masses or axillary lymphadenopathy.
A 62-year-old woman presents with an intensely pruritic, erythematous, scaly lesion over the left nipple that has failed to improve with a 4-week course of topical hydrocortisone.

Matches

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Answer

Match the clinical presentations to their definitive histopathological features: Patient 1 (trauma/calcifications) has fat necrosis, Patient 2 (rapidly growing mass) has a phyllodes tumor, Patient 3 (bloody discharge) has an intraductal papilloma, and Patient 4 (steroid-refractory scaly nipple) has Paget disease of the breast.
Each clinical vignette uniquely maps to a single histopathological entity. Fat necrosis is linked to trauma and foamy macrophages. Phyllodes tumor presents as a rapidly enlarging mass with leaf-like stroma. Intraductal papilloma causes bloody discharge due to fibrovascular cores in a duct. Paget disease presents as an eczematous plaque containing intraepidermal malignant cells with clear halos.

Step-by-Step Solution

1
Analyze the presentation of Patient 1 (surgery history, skin retraction, coarse calcifications).
Diagnose fat necrosis.
Prior surgical trauma leads to fat necrosis, which can mimic malignancy clinically (skin retraction, spiculated mass) but shows lipid-laden macrophages and giant cells on biopsy.
2
Analyze the presentation of Patient 2 (54-year-old, rapidly enlarging 6-cm mobile mass).
Diagnose phyllodes tumor.
Rapid growth of a large, well-circumscribed mass in this age group points to a fibroepithelial lesion with cellular stroma and leaf-like architecture.
3
Analyze the presentation of Patient 3 (spontaneous, bloody nipple discharge without a mass).
Diagnose intraductal papilloma.
The most common cause of unilateral bloody discharge is a benign intraductal papilloma, defined by fibrovascular cores within a duct.
4
Analyze the presentation of Patient 4 (62-year-old, scaly nipple failing steroid therapy).
Diagnose Paget disease of the breast.
An eczematous-appearing nipple lesion that does not respond to topical therapy is Paget disease until proven otherwise, characterized by intraepidermal clear cells.

Key Concept

Clinicopathologic correlation of distinct breast disorders, distinguishing benign conditions, high-risk lesions, and malignancies based on age, presentation, and cellular architecture.
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