title: Patterns of failure and results of preoperative irradiation vs radiation therapy alone in carcinoma of the pyriform sinus.
mesh_terms: D002277:Carcinoma / Q000401:mortality / Q000532:radiotherapy* / Q000601:surgery; D005260:Female; D005402:Fistula / Q000209:etiology; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D010608:Pharyngeal Diseases / Q000209:etiology; D010610:Pharyngeal Neoplasms / Q000401:mortality / Q000532:radiotherapy* / Q000601:surgery; D011832:Radiation Injuries; D011878:Radiotherapy / Q000009:adverse effects; D012871:Skin Diseases / Q000209:etiology