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Washington University Experience | NEOPLASMS (MENINGIOMA) | Rhabdoid | 25A1 Atypical with focal rhabdoid (Case 25) H&E 20X
Case 25 History ---- The patient was a 59 year old woman with an olfactory groove mass. Clinical diagnosis: Meningioma. Operative procedure: Craniotomy. ---- 25A1-3 Sections show a meningeal neoplasm composed of predominantly meningothelial morphology, with focal whorls (<10%), focal rhabdoid features (5- 10%), and a small component with chondroid features (<1%). The meningothelial areas show focal small cell change, hypercellularity, a sheeting architecture, in a background with broad collagen bands. There are multiple areas of tumor necrosis. The overall mitotic activity is low (1/10HPF).
