Post-irradiation osteogenic sarcoma.
D000293:Adolescent; D002294:Carcinoma, Squamous Cell / Q000532:radiotherapy; D006801:Humans; D008297:Male; D008339:Mandibular Neoplasms / Q000209:etiology*; D009381:Neoplasms, Radiation-Induced / Q000209:etiology*; D012516:Osteosarcoma / Q000209:etiology*; D010610:Pharyngeal Neoplasms / Q000532:radiotherapy