Neurodegenerative Diseases USMLE Step 1 Practice Question
A 45-year-old woman presents with a 2-year history of progressive right-sided sensorineural hearing loss and tinnitus. She reports imbalance but denies vertigo. Vital signs: BP 128/82, HR 76, RR 14, Temp 37°C, SpO2 98%. Neurologic examination reveals right-sided diminished hearing and positive Romberg sign. Brain MRI demonstrates a 2-cm enhancing mass at the right cerebellopontine angle arising from CN VIII. Audiometry confirms sensorineural hearing loss. Which diagnosis best explains these findings?
Answer choices
- AMedulloblastoma
- BMeningioma
- CVestibular schwannomaCorrect answer
- DPituitary adenoma
- EGlioblastoma
- FAcoustic neurofibroma
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