Meningioma associated with chronic subdural hematoma and meningothelial cell cluster within the hematoma capsule—case report

N Tanaka, M Yamamoto, M Jimbo, M Ide, O Kubo
Neurologia Medico-chirurgica 1994, 34 (3): 176-9
A 47-year-old female presented with an unusual association of convexity meningioma with chronic subdural hematoma, manifesting as headache and left hemiparesis 10 days before admission. Computed tomography showed an isodense right frontal tumor with significant enhancement postcontrast and a hypodense subdural hematoma in the right frontotemporal area. Craniotomy exposed an extracerebral tumor facing a liquefied subdural hematoma encapsulated by outer and inner membranes. The hematoma was evacuated and the tumor was totally removed. Histological examination revealed a meningothelial meningioma with hemangiopericytic components. Microscopic examination of the hematoma capsule revealed a cluster of meningothelial cells in the outer membrane.

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