MACROSCOPIC DESCRIPTION (not shown):
An irregular piece of moderately firm dull yellow tissue 38x20x10mm. A variably lobulated piece of dull yellow to pale grey firm tissue 50x31x29mm with a slightly adherent sheet of dura attached 40x22x3mm. The dura separated from the tumour upon handling and the aspect adherent to tumour as well as the apposing face on the tumour has been inked blue, and the opposite aspect of the dura inked black. The cut surface is uniform dull yellow with some central congestion.
MICROSCOPIC DESCRIPTION:
The sections show a densley hypercellular meningioma with a predominant syncytial architecture. A diffuse sheeted arrangement of tumour cells is also seen and scattered calcified Psammoma bodies are noted. Tumour cells show moderate nuclear pleomorphism with conspicuous nucleoli. Moderate numbers of mitotic figures are identified (6/10HPF) and there are scattered foci of tumour necrosis. There is widespread invasion of underlying brain parenchyma with oedema and reactive gliosis. The features are of atypical meningioma (WHO Grade II). The dural margins are clear of tumour
FINAL DIAGNOSIS: Atypical meningioma with brain invasion (WHO Grade II)