1 MCQs in ENT for NEET PG
A 52-year-old man presents with progressive unilateral high-frequency sensorineural hearing loss and tinnitus over 18 months. Audiometry shows asymmetric loss with disproportionately poor speech discrimination (rollover phenomenon). MRI reveals an isointense T1, hyperintense T2 lesion that enhances intensely post-gadolinium, with an intracanalicular component and a rounded cerebropontine angle component creating an "ice-cream-cone" appearance. The structure marked **A** in the diagram represents this lesion. Which of the following best describes the origin of this tumor?
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