The patient went on to have a resection.

Histology

MICROSCOPIC DESCRIPTION: The sections show a moderately cellular schwannoma. It mainly contains Antoni A areas with fascicles of spindle cells. There is focal palisading with Verocay body formation. A small amount of Antoni B areas with microcystic change is also seen. The tumor cells show no significant nuclear pleomorphism. Mitoses are inconspicuous. No evidence of malignancy is identified.

FINAL DIAGNOSIS: Vestibular schwannoma.