title: [Study on radiation-induced malignant neoplasms].
abstract: Nineteen patients with newly developed malignant neoplasms following radiotherapy are presented. The primary lesions of 6 patients were tuberculous cervical lymphadenitis, the primary lesions of the other 13 patients were malignant neoplasms. The radiation-induced malignant neoplasms of 15 patients were epithelial, only 4 patients were non-epithelial. The prognosis was not good. However, we think that radiation-induced malignant neoplasms are not highly radioresistant and that the benefits of radiotherapy for malignant neoplasms outweigh the risk of radiation-induced malignant neoplasms.
mesh_terms: D000230:Adenocarcinoma / Q000453:epidemiology; D000293:Adolescent; D000328:Adult; D000368:Aged; D001859:Bone Neoplasms / Q000453:epidemiology / Q000401:mortality; D001943:Breast Neoplasms / Q000532:radiotherapy; D002294:Carcinoma, Squamous Cell / Q000453:epidemiology / Q000401:mortality; D002295:Carcinoma, Transitional Cell / Q000453:epidemiology / Q000401:mortality; D004938:Esophageal Neoplasms / Q000453:epidemiology / Q000401:mortality; D005260:Female; D005354:Fibrosarcoma / Q000453:epidemiology / Q000401:mortality; D006801:Humans; D007564:Japan; D007822:Laryngeal Neoplasms / Q000532:radiotherapy; D008175:Lung Neoplasms / Q000532:radiotherapy; D008297:Male; D008875:Middle Aged; D009381:Neoplasms, Radiation-Induced / Q000453:epidemiology*; D012004:Rectal Neoplasms / Q000453:epidemiology / Q000401:mortality; D012509:Sarcoma / Q000453:epidemiology / Q000401:mortality; D012983:Soft Tissue Neoplasms / Q000453:epidemiology / Q000401:mortality; D001749:Urinary Bladder Neoplasms / Q000453:epidemiology / Q000401:mortality; D002583:Uterine Cervical Neoplasms / Q000532:radiotherapy