title: Histopathologic investigation of a case of meningioangiomatosis not associated with von Recklinghausen's disease.
abstract: A case of meningioangiomatosis not associated with von Recklinghausen's disease is reported. Microscopically, irregularly branched blood vessels extending into the gray matter from the meningeal surface are surrounded by a concentric arrangement of proliferating spindle-formed cells. Ultrastructurally these proliferating cells are composed of elongated heterochromatin-rich nuclei and slender cytoplasm-containing microfilaments, occasionally associated with desmosomal junctions and basal laminalike structures. Judging from these findings, together with a negative immune reaction for S-100 protein, the histogenesis of these proliferating cells is most probably meningothelial in origin.
mesh_terms: D000328:Adult; D000798:Angiomatosis / Q000648:ultrastructure*; D006801:Humans; D007124:Immunoenzyme Techniques; D008297:Male; D008577:Meningeal Neoplasms / Q000648:ultrastructure*; D008578:Meninges / Q000473:pathology*; D008579:Meningioma / Q000648:ultrastructure*; D008854:Microscopy, Electron; D009456:Neurofibromatosis 1