title: Intraoperative radiation therapy for recurrent head-and-neck cancer: the UCSF experience.
abstract: OBJECTIVE
  To review a single-institutional experience with the use of intraoperative radiation therapy (IORT) for recurrent head-and-neck cancer.
  
  
  METHODS
  Between 1991 and 2004, 137 patients were treated with gross total resection and IORT for recurrence or persistence of locoregional cancer of the head and neck. One hundred and thirteen patients (83%) had previously received external beam radiation as a component of definitive therapy. Ninety-four patients (69%) had squamous cell histology. Final surgical margins were microscopically positive in 56 patients (41%). IORT was delivered using either a modified linear accelerator or a mobile electron unit and was administered as a single fraction to a median dose of 15 Gy (range, 10-18 Gy). Median follow-up among surviving patients was 41 months (range, 3-122 months).
  
  
  RESULTS
  The 1-year, 2-year, and 3-year estimates of in-field control after salvage surgery and IORT were 70%, 64%, and 61%, respectively. Positive margins at the time of IORT predicted for in-field failure (p = 0.001). The 3-year rates of locoregional control, distant metastasis-free survival, and overall survival were 51%, 46%, and 36%, respectively. There were no perioperative fatalities. Complications included wound infection (4 patients), orocutaneous fistula (2 patients), flap necrosis (1 patient), trismus (1 patient), and neuropathy (1 patient).
  
  
  CONCLUSIONS
  Intraoperative RT results in effective disease control with acceptable toxicity and should be considered for selected patients with recurrent or persistent cancers of the head and neck.
authors.affiliation: Department of Radiation Oncology, University of California, San Francisco, Comprehensive Cancer Center, San Francisco, CA. allenmchen@yahoo.com
authors.forename: Allen M
authors.initials: AM
authors.lastname: Chen
authors.forename: M Kara
authors.initials: MK
authors.lastname: Bucci
authors.forename: Mark I
authors.initials: MI
authors.lastname: Singer
authors.forename: Joaquin
authors.initials: J
authors.lastname: Garcia
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Kaplan
authors.forename: Albert S
authors.initials: AS
authors.lastname: Chan
authors.forename: Theodore L
authors.initials: TL
authors.lastname: Phillips
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002294:Carcinoma, Squamous Cell / Q000401:mortality / Q000532:radiotherapy / Q000601:surgery; D003131:Combined Modality Therapy; D018572:Disease-Free Survival; D005260:Female; D006258:Head and Neck Neoplasms / Q000401:mortality / Q000532:radiotherapy* / Q000601:surgery; D006801:Humans; D007432:Intraoperative Period; D008297:Male; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local / Q000401:mortality / Q000532:radiotherapy* / Q000601:surgery; D018365:Neoplasm, Residual; D011832:Radiation Injuries / Q000209:etiology; D016879:Salvage Therapy