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A 70-year-old man with a history of type 2 diabetes and benign prostatic hyperplasia presents to the emergency department with a 3-week history of progressively worsening mid-to-lower back pain. The pain is localized to the thoracolumbar junction, awakens him at night, and is not relieved by rest or over-the-counter analgesics. Over the past 48 hours, he has developed bilateral leg weakness and urinary retention. He reports an unintentional 3-kg (6.6-lb) weight loss over the past month. Four weeks ago, he was treated for a febrile urinary tract infection with a 14-day course of ciprofloxacin. Temperature is 37.8°C (100.0°F), blood pressure is 142/86 mmHg, and pulse is 92/min. Neurological examination reveals 3/5 strength in the bilateral lower extremities, decreased rectal sphincter tone, and brisk bilateral patellar reflexes. Arrange the following differential diagnoses from the highest pre-test probability (most likely and most urgent to evaluate) to the lowest pre-test probability (least likely).

A $28$-year-old male is rushed to the resuscitation bay by emergency medical services following a ballistic injury to the left upper abdominal quadrant. On primary survey, his airway is secured, blood pressure is $65/35$ mmHg, and heart rate is $142$/min. A massive transfusion protocol is initiated, and he is transferred immediately to the operating room for an exploratory laparotomy. Upon entering the abdomen, massive hemoperitoneum, a shattered spleen, a deep hepatic laceration, and multiple small bowel perforations are identified. The surgeon decides to proceed with a damage control approach due to the patient's profound hypothermia and developing coagulopathy. Arrange the following procedural and management steps in the correct chronological sequence for damage control surgery.

A 48-year-old man is brought to the emergency department by his wife due to sudden, excruciating retrosternal chest pain that began 2 hours ago. He reports the pain started immediately after an episode of forceful retching and vomiting following a large meal with alcohol. His temperature is 38.3°C (100.9°F), blood pressure is 105/65 mmHg, heart rate is 118/min, and respiratory rate is 24/min. Physical examination reveals diaphoresis and a crunching sound synchronized with the heartbeat on cardiac auscultation. Subcutaneous crepitus is palpable in the suprasternal notch. Arrange the following steps in the most appropriate sequence for the management of this patient.

An internal medicine physician is coordinating the transfer of a patient with end-stage liver disease and recent hepatic encephalopathy from a hospital step-down unit to a long-term care facility. To prevent adverse drug events during this care transition, the physician must strictly follow the standardized medication reconciliation process. Arrange the following steps of care transition medication reconciliation in the correct chronological sequence according to established patient safety guidelines.

A 28-year-old woman is brought to the emergency department by paramedics due to continuous generalized shaking of her arms and legs. Her roommate states she found her seizing 20 minutes ago. The patient has a history of epilepsy but has not taken her medications recently due to insurance issues. On arrival, she is unresponsive to verbal commands and has continuous, rhythmic, bilateral extremity jerking. Her blood pressure is 142/88 mm Hg, heart rate is 118/min, respiratory rate is 22/min, and oxygen saturation is 96% on a non-rebreather mask. Fingerstick blood glucose is 98 mg/dL. Two large-bore intravenous lines are established.

Arrange the following pharmacologic interventions in the most appropriate chronological sequence for managing this patient's condition, assuming she continues to seize despite each successive therapy.

An outpatient clinic physician is preparing to disclose a diagnosis of Alzheimer disease to a 64-year-old former mechanic and his wife, following a recent comprehensive neurocognitive evaluation and brain MRI. The physician intends to follow the SPIKES protocol for delivering difficult medical news. Arrange the following physician actions in the correct chronological sequence according to this communication framework.

A 48-year-old man presents to the clinic to establish primary care. The physician intends to implement a structured, evidence-based behavioral intervention for smoking cessation during the visit. Arrange the following physician actions in the correct chronological sequence according to standard clinical guidelines for tobacco cessation (the 5 A's model).

A 55-year-old woman presents to the clinic to review the results of a recent breast biopsy. The physician is preparing to deliver the diagnosis of invasive ductal carcinoma. According to the SPIKES protocol for delivering bad news, arrange the following physician actions and statements in the correct chronological order.

A 42-year-old man with a history of poorly controlled hypertension and a recent transient ischemic attack presents to the clinic for a follow-up examination. During the encounter, the physician notes a strong odor of tobacco smoke on the patient's clothing. The physician plans to implement a structured, guideline-concordant tobacco cessation intervention. According to the United States Preventive Services Task Force (USPSTF) recommended framework for counseling, arrange the following physician actions in the correct sequential order from first to last.

A 72-year-old female patient with an established diagnosis of polymyalgia rheumatica is evaluated in the emergency department after noticing a sudden, painless loss of vision in her right eye two hours prior to arrival. During the interview, she notes experiencing new-onset right-sided jaw pain when chewing, along with fatigue and low-grade fevers over the preceding week. Visual acuity testing reveals light perception only in the right eye and 20/30 in the left eye. The right pupil exhibits a relative afferent pupillary defect. Fundoscopic examination of the right eye reveals a pale, opaque retina with a prominent cherry-red spot in the macula. Based on the complete clinical presentation and examination findings, arrange the following differential diagnoses for her acute vision loss from highest clinical probability to lowest.

A 29-year-old female patient is evaluated in the surgical intensive care unit on postoperative day two following an uncomplicated open cholecystectomy. Over the past four hours, she has become profoundly delirious and agitated. Her husband notes she has a history of "mild hyperthyroidism" for which she had been taking medication intermittently, but she completely discontinued all medical therapy one month ago.

Vital signs demonstrate a temperature of $39.8^\circ\text{C}$ ($103.6^\circ\text{F}$), pulse of $158/\text{min}$, blood pressure of $152/68\text{ mmHg}$, and respirations of $28/\text{min}$.

Physical examination reveals an actively hallucinating and diaphoretic patient. Ophthalmic examination shows bilateral proptosis and lid retraction. The thyroid gland is diffusely enlarged, firm, and a continuous bruit is audible over the lateral lobes. Cardiovascular examination reveals a regular, rapid rhythm with a hyperdynamic precordium. A fine tremor is present in the upper extremities. Laboratory studies reveal a TSH of $<0.01\text{ }\mu\text{U/mL}$ and free T4 of $5.8\text{ ng/dL}$.

Arrange the following pharmacologic interventions in the strictly correct chronological sequence to maximize therapeutic efficacy and prevent an acute exacerbation of this patient's underlying condition.

A 74-year-old female patient with a history of severe chronic obstructive pulmonary disease is preparing for transfer to a post-acute rehabilitation facility following a prolonged hospitalization for acute hypoxic respiratory failure. Her clinical status has stabilized, and the hospital team is initiating the discharge process. To ensure a safe transition of care and adhere to established discharge protocols, arrange the following transitional care steps in the most appropriate chronological sequence.

A 24-year-old male is transported to the emergency department by ambulance after being found unresponsive in his apartment. Paramedics report finding empty bottles of amitriptyline and alprazolam on his nightstand.

Upon arrival, the patient responds only with incomprehensible sounds to a deep sternal rub. His respirations are shallow and sonorous. Vital signs demonstrate a blood pressure of 82/48 mmHg, heart rate of 138/min, and respiratory rate of 8/min with an oxygen saturation of 88% on room air. The bedside cardiac monitor displays a wide-complex regular rhythm with a QRS duration of 155 ms.

Arrange the following management steps in the most appropriate sequential order to stabilize and evaluate this patient.

A 54-year-old man is brought to the emergency department after coughing up approximately 700 mL of bright red blood over the past two hours. He has a history of treated pulmonary tuberculosis with known residual cavitary disease in the right upper lobe. Upon arrival, he continues to expectorate large volumes of blood and appears in moderate respiratory distress. Vital signs are temperature 37.1°C (98.8°F), blood pressure 112/68 mmHg, pulse 118/min, and respiratory rate 28/min. Oxygen saturation is 87% on room air.

Arrange the following management and procedural interventions in the most appropriate chronological sequence for this patient's presentation.

A triage nurse calls the physician to immediately evaluate a patient who just arrived with profound muscle weakness. The patient is a 57-year-old male with a history of hypertension, type 2 diabetes mellitus, and end-stage renal disease who reports missing his last two scheduled hemodialysis sessions due to severe regional weather. He complains of a heavy sensation in his limbs and perioral numbness that began earlier today. His blood pressure is 150/88 mmHg, heart rate is 52/min, and respiratory rate is 18/min. Cardiopulmonary auscultation is unremarkable, but neurologic examination reveals symmetric 3/5 weakness in the proximal and distal muscles of all four limbs. An urgent 12-lead electrocardiogram is obtained and displays significantly peaked T waves, flattened P waves, and a widened QRS complex. A venous blood gas analysis indicates a serum potassium concentration of 7.9 mEq/L.

Arrange the following pharmacologic therapies in the correct chronological sequence for the acute management of this life-threatening presentation.

A 43-year-old previously healthy female is evaluated in the outpatient clinic for a six-month history of progressive fatigue and breathlessness upon exertion. She has no chronic medical conditions, takes no medications, and has never smoked. Vital signs include a heart rate of 92/min, blood pressure of 110/70 mm Hg, and oxygen saturation of 97% on room air. Jugular venous pressure is estimated at 8 cm H2O. Auscultation reveals a prominently accentuated pulmonary component of the second heart sound and a faint holosystolic murmur at the lower left sternal border. Lungs are clear. Arrange the following diagnostic studies in the most appropriate, guideline-recommended stepwise sequence for evaluating this patient's suspected condition.

A 61-year-old man with a history of uncontrolled hypertension and a 40-pack-year smoking history is brought to the emergency department for sudden-onset, severe chest pain. He describes the pain as sharp, excruciating, and radiating directly to the space between his shoulder blades. He appears diaphoretic and in acute distress. Vital signs show a heart rate of 110/min, respiratory rate of 22/min, and blood pressure of 185/105 mmHg in the right arm and 135/85 mmHg in the left arm. Physical examination reveals an early diastolic decrescendo murmur auscultated at the right upper sternal border. An electrocardiogram reveals sinus tachycardia with non-specific ST-segment changes.

Arrange the following differential diagnoses in order from the MOST likely (highest pre-test probability) to the LEAST likely, based on this patient's clinical presentation.

A 19-year-old male college student is brought to the emergency department by his roommates because of confusion and a high fever. His roommates report that he complained of a severe headache and neck stiffness yesterday. Over the past few hours, he has become increasingly lethargic and developed a rapidly spreading purpuric rash on his lower extremities. He is oriented only to his name. His temperature is 39.8°C (103.6°F), blood pressure is 75/40 mmHg, heart rate is 138/min, respiratory rate is 26/min, and oxygen saturation is 94% on room air. The patient is moving all four extremities spontaneously.

Arrange the following management steps in the most appropriate sequential order for this patient.

Emergency medical responders bring a 55-year-old woman to the emergency department due to bilateral lower extremity weakness that began 48 hours ago. She reports a four-week history of relentless, deep mid-back pain that frequently awakens her from sleep and is refractory to over-the-counter analgesics. Her past medical history is significant for estrogen-receptor-positive breast cancer, for which she completed adjuvant endocrine therapy one year ago. On physical examination, her temperature is 37.2°C (99.0°F), blood pressure is 135/85 mm Hg, and pulse is 92/min. There is focal tenderness to percussion over the T9 and T10 spinous processes. Neurological evaluation reveals 3/5 motor strength in the bilateral hip flexors, knee extensors, and ankle dorsiflexors. Deep tendon reflexes are 3+ at the patellae and Achilles bilaterally. Upgoing plantar reflexes (positive Babinski sign) are noted bilaterally. Pinprick sensation is markedly diminished below the level of the umbilicus. Rectal examination demonstrates decreased anal sphincter tone.

Based on the clinical presentation, arrange the following differential diagnoses from most likely (top) to least likely (bottom).

A 28-year-old woman, G2P1, at 26 weeks gestation, presents to the emergency department with acute-onset right-sided pleuritic chest pain and shortness of breath. She has no significant past medical history. Vital signs show a heart rate of 115/min, respiratory rate of 24/min, and oxygen saturation of 94% on room air. Physical examination is unremarkable with clear lungs and normal heart sounds. The patient's presentation is highly suspicious for a pulmonary embolism (PE).

Arrange the following diagnostic modalities in the most appropriate sequential order for the evaluation of this patient, from the initial test to the final definitive imaging study if preceding tests are nondiagnostic.