title: Radiation-induced extraskeletal osteosarcoma.
mesh_terms: D000328:Adult; D001706:Biopsy; D001943:Breast Neoplasms / Q000532:radiotherapy; D002285:Carcinoma, Intraductal, Noninfiltrating / Q000532:radiotherapy; D005260:Female; D006801:Humans; D009132:Muscles / Q000473:pathology; D009381:Neoplasms, Radiation-Induced; D012516:Osteosarcoma / Q000209:etiology* / Q000473:pathology; D011878:Radiotherapy / Q000009:adverse effects*; D011879:Radiotherapy Dosage; D013899:Thoracic Neoplasms / Q000209:etiology* / Q000473:pathology; D013997:Time Factors