The patient went on to have a laminectomy and tumour resection. A number of months later they also underwent a posterior fossa craniotomy and excision of the second tumour. 

Spinal mass 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 tumour cells show no significant nuclear pleomorphism. Mitoses are inconspicuous. There is no evidence of necrosis. No evidence of malignancy is identified.

FINAL DIAGNOSIS: Spinal tumour: Schwannoma.

Posterior fossa mass histology

MICROSCOPIC DESCRIPTION: The sections show a moderately cellular meningioma with infiltration into the attached dura. The tumour comprises mainly

fascicles.  The tumour cells have ovoid nuclei with no significant nuclear pleomorphism. Mitoses are inconspicuous.  There is no necrosis. No brain parenchyma is included in the biopsy.  There is no atypical or malignant change. 

FINAL DIAGNOSIS: Posterior fossa: Meningioma (WHO Grade I).

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