Mycology/Parasitology USMLE Step 1 Practice Question
A 55-year-old man with poorly controlled diabetes mellitus presents with fever (39.2°C), tachycardia (110 bpm), and black necrotic tissue on the hard palate extending into the right orbit. He denies rhinorrhea. Labs show blood glucose 520 mg/dL, arterial pH 7.18, and negative blood cultures. CT reveals opacification of the maxillary sinus. Palatal biopsy demonstrates wide, ribbon-like, non-septate hyphae with right-angle branching. What is the most likely diagnosis?
Answer choices
- ACandidiasis
- BAspergillosis
- CCryptococcosis
- DHistoplasmosis
- EMucormycosisCorrect answer
- FCoccidioidomycosis
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