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Pathology Practice MCQs

Browse 15,526 high-yield clinical questions in Pathology. Includes detailed explanations, options, and topic tags.

#14673 General

A patient undergoing chest x-ray following an automobile accident is found to have an enlarged mediastinum with bilateral hilar and right paratracheal adenopathy. The patient has been asymptomatic, but careful examination demonstrates an enlarged cervical lymph node. This node is biopsied and demonstrates involvement by small, non-caseating granulomas. Occasional giant cells with stellate inclusions are seen within the granulomas. These are most likely which of the following?

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#14690 Infectious Disease

A 40-year-old man has been bothered by oral candidiasis, fever, and diarrhea for the past year. On physical examination, he has muscle wasting. His weight is 70% of normal for his height and age. He has generalized nontender lymphadenopathy, but no hepatosplenomegaly. He developed three irregular, 1- to 2-cm, reddish-purple, nodular skin lesions on his forearm in the past 3 months. Laboratory findings show hemoglobin, 12.2 g/dL; hematocrit, 36.5%; MCV, 85 mm3; platelet count, 188,000/ mm3; and WBC count, 2460/ mm3 with 82% segmented neutrophils, 4% bands, 6% lymphocytes, 6% monocytes, and 2% eosinophils. Infection with which of the following organisms is most likely to produce these findings?

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#14693 Infectious Disease

A 45-year-old construction worker suffers a penetrating wound of the left leg, which is cleaned and sutured. Three days later, the patient presents with sudden onset of severe pain at the site of injury. Physical examination shows darkening of the surrounding skin, hemorrhage, and cutaneous necrosis. The wound shows a thick serosanguinous discharge with gas bubbles and a fragrant odor. Which of the following is the most likely etiology of this patient's wound infection?

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