title: [The ultrastructure of human rhabdomyosarcomas].
abstract: As a result of exploration of the ultrastructure of 5 human rhabdomyosarcomas it was shown that, if present in the cytoplasm, cells of fibrillar bundles consisting of filaments of two types (40-60 A and 100-150 A) and regular aggregations of Z-like bands type present a reliable diagnostic sign of the myogenic origin of tumors. A possibility to determine such undifferentiated microfibrillae in electrone-microscopic study makes it rational to use the method as an adjunct in association with light optics to diagnose malignant soft tissue tumors of occult genesis.
mesh_terms: D005260:Female; D006801:Humans; D008297:Male; D008854:Microscopy, Electron; D009210:Myofibrils / Q000648:ultrastructure*; D009362:Neoplasm Metastasis; D009364:Neoplasm Recurrence, Local; D012208:Rhabdomyosarcoma / Q000473:pathology*; D013848:Thigh
vernacular_title: Ul'trastruktura rabdomiosarkom cheloveka