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).