title: Definitive radiotherapy for T1-T2 squamous cell carcinoma of pyriform sinus.
abstract: OBJECTIVE
  To report the long-term results after definitive radiotherapy (RT) for T1-T2 pyriform sinus squamous cell carcinoma.
  
  
  METHODS
  The data from 123 patients with T1-T2 pyriform sinus squamous cell carcinoma treated with RT with or without neck dissection between November 1964 and June 2003 were analyzed. The median follow-up for all patients was 3.2 years, and the median follow-up for living patients was 10.7 years.
  
  
  RESULTS
  The 5-year local control, locoregional control, freedom from distant metastasis, cause-specific survival, and overall survival rate was 85%, 70%, 75%, 61%, and 35%, respectively. The ultimate local control rate, including successful salvage of RT failure, for T1 and T2 cancer patients was 96% and 94%, respectively. The overall local control rate with a functional larynx was 83%. Pretreatment computed tomography tumor volume data were available for 55 patients. The median computed tomography tumor volume was 4.2 cm(3) (range, 0-22.4). Local control was worse for patients with a tumor volume >6.5 cm(3) compared with those with a smaller tumor volume. Of the 123 patients, 16% developed moderate to severe acute (2%), late (9%), or postoperative (5%) complications.
  
  
  CONCLUSIONS
  Local control with larynx preservation after definitive RT for T1-T2 pyriform sinus squamous cell carcinoma likely results in local control and survival similar to that after total laryngectomy or larynx-conserving surgery. Two-thirds of our living patients retained a functional larynx.
authors.affiliation: Department of Radiation Oncology, University of Florida College of Medicine, Gainesville, FL 32610-0385, USA.
authors.forename: Anna
authors.initials: A
authors.lastname: Rabbani
authors.forename: Robert J
authors.initials: RJ
authors.lastname: Amdur
authors.forename: Anthony A
authors.initials: AA
authors.lastname: Mancuso
authors.forename: John W
authors.initials: JW
authors.lastname: Werning
authors.forename: Jessica
authors.initials: J
authors.lastname: Kirwan
authors.forename: Christopher G
authors.initials: CG
authors.lastname: Morris
authors.forename: William M
authors.initials: WM
authors.lastname: Mendenhall
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002294:Carcinoma, Squamous Cell / Q000401:mortality / Q000532:radiotherapy* / Q000556:secondary / Q000601:surgery; D005260:Female; D006801:Humans; D007822:Laryngeal Neoplasms / Q000401:mortality / Q000473:pathology / Q000532:radiotherapy* / Q000601:surgery; D007825:Laryngectomy; D008297:Male; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local; D011878:Radiotherapy; D015996:Survival Rate