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Evaluate the following patient profiles during routine ambulatory visits. Match each patient with the most appropriate, guideline-concordant next step in preventive care based on current United States Preventive Services Task Force (USPSTF) and Advisory Committee on Immunization Practices (ACIP) recommendations.

Match each clinical quality and patient safety scenario with the most appropriate quality improvement (QI) tool or framework used to address it.

An unhoused male patient born in $1968$ presents to a community health outreach clinic to establish primary care. He has not received any medical care in nearly a decade. Medical records indicate a history of chronic hepatitis C virus infection complicated by biopsy-proven cirrhosis; he successfully completed direct-acting antiviral therapy $6$ years ago and achieved a sustained virologic response. He reports a history of intravenous substance use, which he also ceased $6$ years ago. The patient currently smokes $1.5$ packs of cigarettes daily, a habit he began at age $18$. His medical history is notable for a severe anaphylactic reaction (hypotension and wheezing) to dietary eggs during childhood. Physical examination reveals scattered spider angiomas but no ascites, jaundice, or encephalopathy. Vital signs are within normal limits. Which of the following preventive health interventions are appropriate for this patient at today's visit? (Select all that apply)

Match each patient's clinical presentation with the single most appropriate initial or confirmatory imaging study to establish the diagnosis.

A 71-year-old man is brought to the emergency department with a 3-day history of worsening shortness of breath, orthopnea, and palpitations. His past medical history is significant for heart failure with reduced ejection fraction, atrial fibrillation, and osteoarthritis. His maintenance medications include sacubitril-valsartan, carvedilol, apixaban, digoxin, and furosemide. He reports that 10 days ago, he developed a 'head cold' and a severe flare of his knee pain, for which he sought care at an urgent care clinic and purchased several over-the-counter products. During the medical history evaluation, the physician must identify any recent pharmacologic additions. Which of the following agents, if uncovered during the medication history, possess a direct pathophysiologic mechanism or drug-drug interaction that explains his acute clinical deterioration? (Select all that apply)

During a routine health maintenance examination, a physician palpates an asymptomatic, firm nodule in the right anterior neck of an adult female patient. The patient denies any recent weight changes, palpitations, dysphagia, or hoarseness. Her vital signs are within normal limits.

Laboratory evaluation reveals a serum thyroid-stimulating hormone (TSH) level of $2.1 \text{ mIU/L}$ (normal: $0.4 - 4.0 \text{ mIU/L}$) and a free T4 of $1.3 \text{ ng/dL}$ (normal: $0.9 - 1.7 \text{ ng/dL}$).

A dedicated neck ultrasound demonstrates a $1.8\text{-cm}$ solid, hypoechoic nodule in the right thyroid lobe with irregular margins and punctate microcalcifications. A subsequent fine-needle aspiration biopsy is performed, revealing clusters of cells that demonstrate pale, empty-appearing nuclei, prominent longitudinal nuclear grooves, and scattered laminated calcific spherules.

Based on the confirmed diagnosis, which of the following correctly pairs the predominant molecular pathogenesis of this patient's neoplasm with a principle of its clinical management?

A healthy young adult male, aged 23, arrives at an occupational medicine office to undergo medical clearance for a new physically demanding job. He denies any history of exertional dyspnea, precordial discomfort, or lightheadedness. He maintains an active lifestyle, engaging in high-intensity interval training regularly without limitation. Vital signs demonstrate a temperature of 37.0°C (98.6°F), a blood pressure measurement of 110/70 mmHg, and a resting heart rate of 62/min. Evaluation of the precordium demonstrates a quiet, non-displaced apical impulse. Cardiac auscultation identifies a grade 2/6 crescendo-decrescendo mid-systolic murmur located at the left upper sternal border. When the clinician asks him to stand quickly from a supine position, the amplitude of the murmur significantly diminishes. A physiologic split of the second heart sound is appreciated during inspiration. The remainder of the physical assessment is entirely within normal limits. Based on these physical examination findings, which of the following is the most appropriate next diagnostic step?

An ambulatory care clinic receives a 71-year-old man for the assessment of a non-healing sore on his right foot, present for four weeks. His medical history is significant for a 40 pack-year smoking habit and type 2 diabetes mellitus. He reports intense, burning pain in the right foot that frequently awakens him from sleep; he manages this by sitting on the edge of the bed and letting his legs dangle. During the evaluation, the resident notes the patient's long-standing diabetes and suggests, "This is likely a neuropathic complication. We should proceed with an MRI of the foot to investigate for potential osteomyelitis."

The attending physician intervenes, directing attention to the specific physical characteristics of the lesion: it is situated at the distal tip of the right second toe, features a dry and pale wound base with no purulence, and is surrounded by cool, hairless skin. The attending states that non-invasive arterial studies are the immediate priority.

Based on the attending physician's clinical assessment, which of the following physical examination findings is most specific to the underlying etiology of this patient's ulcer?

Match the following classic radiographic findings with their most likely underlying clinical conditions in adult patients.

A 48-year-old man presents to the outpatient primary care clinic reporting an 8-month history of progressive fatigue, depressed mood, and loss of early morning erections. His past medical history is significant for type 2 diabetes mellitus and obesity. Current medications include metformin, empagliflozin, and lisinopril. Vital signs show a blood pressure of $128/82 \text{ mmHg}$, heart rate of $74 \text{ /min}$, and respiratory rate of $14 \text{ /min}$. His body mass index (BMI) is $36.2 \text{ kg/m}^2$. Physical examination reveals normal secondary sexual hair distribution but soft, slightly small testes bilaterally (estimated volume $12 \text{ mL}$; normal $15-25 \text{ mL}$). Visual field testing by confrontation is normal. Gynecomastia is absent.

Arrange the following laboratory investigations in the most appropriate chronological sequence to establish the diagnosis and determine the etiology of this patient's presenting symptoms.

A 22-year-old man presents to the clinic for a routine evaluation after a pre-employment physical revealed significantly elevated blood pressure. He reports experiencing occasional muscle cramping and generalized weakness, particularly after intense exercise, but is otherwise asymptomatic. He takes no medications, over-the-counter supplements, or herbal remedies. Family history is significant for severe, treatment-resistant hypertension in his father, paternal aunt, and paternal grandmother, all of whom were diagnosed in their early twenties.

Vital signs:
Temperature: 37.0°C (98.6°F)
Blood pressure: 178/112 mmHg
Pulse: 76/min
Respirations: 14/min

Physical examination is unremarkable, with no abdominal bruits, no striae, and normal secondary sexual characteristics.

Laboratory studies:
Serum sodium: 146 mEq/L
Serum potassium: 2.6 mEq/L
Serum chloride: 102 mEq/L
Serum bicarbonate: 31 mEq/L
Blood urea nitrogen: 14 mg/dL
Serum creatinine: 0.9 mg/dL
Plasma renin activity: Undetectable
Serum aldosterone: < 2 ng/dL (Reference: 3-16 ng/dL upright)
Serum morning cortisol: 14 mcg/dL (Reference: 5-25 mcg/dL)

Which of the following is the most likely diagnosis?

Carefully review the following clinical vignettes. Match each distinct patient historical profile (incorporating critical travel, occupational, recreational, and dietary history) to the most likely corresponding infectious etiology that must be prioritized in the differential diagnosis.

A 64-year-old man presents to the emergency department reporting the sudden onset of agonizing, tearing pain in his anterior chest that radiates directly to his mid-back. The pain started abruptly one hour ago while he was eating dinner. His medical history is notable for essential hypertension, obstructive sleep apnea, and hyperlipidemia. The patient appears visibly distressed, agitated, and is sweating profusely. Vital signs demonstrate a temperature of 37.1°C (98.8°F), blood pressure of 220/120 mm Hg in the right arm and 175/95 mm Hg in the left arm, heart rate of 118/min, and respiratory rate of 24/min. Physical examination reveals a new early diastolic decrescendo murmur at the right upper sternal border. Radial pulses are bounding on the right but significantly diminished on the left. Electrocardiography demonstrates sinus tachycardia and criteria for left ventricular hypertrophy, but no acute ST-segment or T-wave changes. Which of the following is the most urgent initial step in the management of this patient?

Match each patient's clinical presentation and initial diagnostic findings with the most appropriate next step in their workup sequence.

A 68-year-old man with a history of poorly controlled hypertension, hyperlipidemia, and a 40-pack-year smoking history is brought to the emergency department due to the sudden onset of severe, continuous room-spinning vertigo that began 3 hours ago. The vertigo is present at rest and is accompanied by intractable nausea and two episodes of emesis. He feels extremely unsteady and cannot walk independently. Vital signs include a blood pressure of 172/94 mm Hg, pulse of 88/min, and respirations of 16/min. He is alert and fully oriented. There is no facial asymmetry, dysarthria, or extremity weakness. To differentiate an acute posterior circulation stroke from a benign peripheral vestibular etiology (such as vestibular neuritis), the physician performs a targeted physical examination of the patient's eye movements. Which of the following constellations of physical examination findings would most specifically establish a central neurological etiology for this patient's acute vestibular syndrome?

A 25-year-old male driver is transported to the trauma bay following a high-speed frontal motor vehicle collision. On arrival, he is unresponsive to verbal stimuli. His breathing is shallow with audible gurgling. Vital signs include a blood pressure of 72/40 mm Hg, pulse of 138/min, and respiratory rate of 8/min. Examination shows extensive maxillofacial ecchymosis and mechanical instability of the pelvic ring. Arrange the following interventions in the most appropriate chronological sequence for this patient's acute management.

A 48-year-old man presents to the clinic with a 7-month history of progressive, deep bone pain in his ribs, hips, and lower extremities, along with significant proximal muscle weakness. He reports difficulty climbing stairs and rising from a seated position. He has no significant past medical history, takes no medications, and consumes a well-balanced diet. He works as a construction manager and spends a significant amount of time outdoors.

Vital signs are within normal limits. Physical examination reveals a waddling gait and diffuse bony tenderness upon palpation of the rib cage and anterior pelvis. Neurologic examination shows 4/5 motor strength in the proximal muscles of the bilateral lower extremities with normal deep tendon reflexes.

Laboratory results are as follows:

Urinalysis is negative for protein, glucose, and blood, with a pH of 6.0.

Which of the following best describes the primary pathophysiologic mechanism underlying this patient's clinical and laboratory findings?

A 22-year-old man with a history of type 1 diabetes mellitus presents to the emergency department with 2 days of severe nausea, recurrent nonbilious vomiting, and diffuse abdominal pain. He reports missing several insulin doses due to his inability to keep food down. He appears lethargic and has severely dry mucous membranes. Vital signs show a temperature of 37.1°C (98.8°F), blood pressure of 100/60 mm Hg, heart rate of 115/min, and respiratory rate of 16/min.

Laboratory results are as follows:

Based on these laboratory findings, which of the following best describes this patient's acid-base status?

A 68-year-old man is evaluated on the medical ward for severe right knee pain and swelling that began abruptly overnight. He was admitted $3$ days ago for community-acquired pneumonia, which has been improving on empiric intravenous ceftriaxone and oral clarithromycin. His medical history is significant for ischemic cardiomyopathy with a left ventricular ejection fraction of $25\%$, chronic kidney disease stage 4 (baseline serum creatinine $2.7 \text{ mg/dL}$), and poorly controlled type 2 diabetes mellitus.

Current medications include lisinopril, carvedilol, furosemide, dapagliflozin, and insulin glargine.

Vital signs are temperature $37.2^\circ\text{C}$ ($99.0^\circ\text{F}$), blood pressure $112/68 \text{ mmHg}$, pulse $88/\text{min}$, and respirations $16/\text{min}$.
Physical examination reveals a warm, erythematous, swollen, and exquisitely tender right knee. Range of motion is severely limited by pain. The remainder of the examination is notable for trace bilateral pitting lower extremity edema.

Laboratory studies obtained this morning show:
Blood urea nitrogen: $48 \text{ mg/dL}$
Creatinine: $2.9 \text{ mg/dL}$
Glucose, fasting: $285 \text{ mg/dL}$

Right knee arthrocentesis yields $15 \text{ mL}$ of cloudy yellow fluid. Synovial fluid analysis shows a leukocyte count of $45,000/\mu\text{L}$ ($85\%$ neutrophils). Polarized light microscopy reveals negatively birefringent, needle-shaped crystals. Gram stain is negative for organisms.

Which of the following is the most appropriate next step in the pharmacologic management of this patient's acute joint condition?

A $62$-year-old man is brought to the emergency department via ambulance due to sudden-onset, severe, tearing chest pain radiating to his interscapular region. The pain began $45$ minutes ago while he was watching television. His past medical history is significant for hypertension, hyperlipidemia, erectile dysfunction, and severe persistent asthma. He was hospitalized two weeks ago for status asthmaticus. His current home medications include amlodipine, atorvastatin, sildenafil as needed, a fluticasone-salmeterol inhaler, and an albuterol rescue inhaler.

On physical examination, the patient appears diaphoretic and in severe distress. Blood pressure is $215/115$ mmHg in the right arm and $210/110$ mmHg in the left arm. Heart rate is $118$ beats/min, respiratory rate is $22$ breaths/min, and oxygen saturation is $94\%$ on room air. Pulmonary auscultation reveals diffuse bilateral expiratory wheezing.

Laboratory results are as follows:
Sodium: $138$ mEq/L
Potassium: $4.1$ mEq/L
Chloride: $102$ mEq/L
Calcium: $8.0$ mg/dL
Albumin: $2.8$ g/dL
Creatinine: $1.1$ mg/dL
Troponin I: $< 0.01$ ng/mL (Normal: $< 0.04$ ng/mL)

A computed tomography (CT) angiography of the chest demonstrates an intimal flap in the descending thoracic aorta, distal to the origin of the left subclavian artery.

Which of the following is the most appropriate initial pharmacologic intervention for this patient?