Cystic acoustic schwannoma

Case contributed by Frank Gaillard
Diagnosis certain

Presentation

Sensorineural hearing loss.

Patient Data

Age: 60 years
Gender: Female
mri

A partially cystic mass is seen in the left cerebellopontine angle with solid enhancing component extending into the acoustic meatus. 

Features are characteristic of an acoustic schwannoma. 

Case Discussion

This patient went on to have a retrosigmoid craniotomy and excision of the mass. 

Histology

MICROSCOPIC DESCRIPTION:

The paraffin sections show fragments of a moderately hypercellular neurilemmoma (Schwannoma). This is composed of both Antoni A and B type tissues. Moderately well formed Verocay bodies are noted in Antoni A areas. Tumor cells have uniform nuclear features. No mitotic figures, densely hypercellular areas of areas of necrosis are identified.

FINAL DIAGNOSIS:

Schwannoma

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