Rhabdomyosarcoma in children. Correlation of form and prognosis in one institution's experience.

All cases of rhabdomyosarcoma and undifferentiated sarcoma accessioned at Texas Children's Hospital since 1954 were reviewed. Electron microscopy and immunohistochemistry were used as aids to diagnosis. Rhabdomyosarcoma was diagnosed by study of biopsy specimens obtained prior to therapy in 63 of these 105 cases.