title: Extraskeletal osteosarcoma: light and electron microscopic study.
mesh_terms: D000368:Aged; D005260:Female; D006801:Humans; D008854:Microscopy, Electron; D012516:Osteosarcoma / Q000473:pathology* / Q000648:ultrastructure; D012983:Soft Tissue Neoplasms / Q000473:pathology* / Q000648:ultrastructure