Neurodegenerative Diseases USMLE Step 1 Practice Question
A 47-year-old woman presents with progressive unilateral hearing loss and tinnitus for 18 months, accompanied by occasional imbalance. Vital signs show BP 128/82, HR 78, RR 14, temperature 37°C, SpO2 98%. MRI demonstrates a 2.3-cm cerebellopontine angle mass with homogeneous enhancement arising from the internal acoustic meatus. Audiometry confirms sensorineural hearing loss. She denies facial weakness or headaches. No neurofibromatosis type 2 history. Which histologic pattern is most likely seen in this lesion?
Answer choices
- APerivascular pseudorosettes
- BAntoni A and Antoni B areas with Verocay bodiesCorrect answer
- CWhorled spindle cells with psammoma bodies
- DPseudopalisading necrosis
- EFried egg cells with chicken wire vasculature
- FHemangiopericytoma pattern with branching staghorn vessels
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