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12217 Medicine

A previously healthy 18-year-old high school student suddenly develops left-sided pleuritic chest pain and dyspnea while at the senior prom. In the emergency room examination reveals BP=110/60 mm Hg, P=110 beats/min, respiratory rate=36 breaths/min, T=37degC (98degF). There are hyperresonance to percussion, decreased tactile fremitus, and absent breath sounds over the left chest anteriorly. Chest x-ray is as shown.What is the most likely etiology of this patient’s condition?

AInfection of the lung parenchyma
BMalignant neoplasm of the pleura
CRib fracture
DRupture of a subpleural apical bleb
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12220 Medicine

A 29-year-old man with acquired immune deficiency syndrome (AIDS) comes to the emergency department because of progressively increasing abdominal discomfort. Examination shows voluntary guarding in the upper abdomen. His bio-chemistry is normal except for an elevated amylase at 370 U/L (25-125 U/L). Which of the following infections can trigger this disorder in AIDS patients?

Atoxoplasmosis
BMycobacterium avium complex
CMycobacterium tuberculosis
DPneumocystis carinii
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