title: Primary brain sarcomas: light and electron microscopic features.
abstract: The following is a description of the diagnostic structural features in three neoplasms in which we diagnosed: primary intraparenchymal brain sarcoma. One appeared to have arisen de novo from the mesenchymal components of the brain parenchyma and was labeled fibrosarcoma. A second case, having mixed features of meningioma and fibrosarcoma, may represent an instance of sarcomatous changes in a prexisting intraparenchymal meningioma. The third sarcoma's ultrastructural characteristics were those of embryonal capillaries and a designation of hemangiosarcoma is proposed for that one. An angiographic, preoperative diagnosis of meningioma was suggested in all three instances. Two of the patients died a few weeks after craniotomy and the third one is alive and well eighteen months after resection of the neoplasm.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001932:Brain Neoplasms / Q000648:ultrastructure*; D005260:Female; D005347:Fibroblasts / Q000648:ultrastructure; D005354:Fibrosarcoma / Q000648:ultrastructure*; D006394:Hemangiosarcoma / Q000648:ultrastructure*; D006801:Humans; D007365:Intercellular Junctions / Q000648:ultrastructure; D008297:Male; D008579:Meningioma / Q000648:ultrastructure*; D008854:Microscopy, Electron; D012509:Sarcoma / Q000648:ultrastructure*