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At the L3/4 level there is a homgeneously enhancing, well circumscribed lesion inseperable from the cauda equina roots.
The sections show a moderately cellular tumour. The tumour forms sheets and nests in a fibrous background. No whorls are seen. The tumour cells have round hyperchromatic nuclei, inconspicuous nucleoli and moderate amounts of clear cytoplasm. There is no nuclear pleomorphism. Mitoses are inconspicuous. There is no necrosis.
DIAGNOSIS: L3/4 spinal tumour: Clear cell meningioma (WHO Grade II).