This patient went on to have a craniotomy and debulking of the tumour. 

Histology

MICROSCOPIC DESCRIPTION: Paraffin sections confirm the frozen section diagnosis.  This is a cellular astrocytic tumour showing moderate to marked nuclear pleomorphism, confluent tumour   necrosis,  and vascular thrombosis. Microvascular proliferation is not a well-developed feature.   There are occasional mitotic figures, and apoptoses are relatively frequent. An oligodendroglial component is not identified.  A low-grade component is not identified. 

FINAL DIAGNOSIS: Left thalamic astrocytoma WHO grade 4 (glioblastoma).

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