title: Stereotactic body radiation therapy in patients with pelvic recurrence from rectal carcinoma.
abstract: OBJECTIVE
  To investigate the clinical applications of stereotactic body radiation therapy (SBRT) using the CyberKnife system for pelvic recurrence from rectal cancer with a focus on survival and toxicity.
  
  
  METHODS
  Between 2002 and 2006, 23 patients with recurrent rectal cancer were treated with SBRT at our institution. The median follow-up was 31 months. Sites of recurrence were pre-sacral in seven patients and the pelvic wall in 16. SBRT doses ranged from 30 to 51 Gy (median 39 Gy) and were delivered in three fractions. Response to treatment was assessed by computed tomography. Overall and local progression-free survival and toxicities were recorded.
  
  
  RESULTS
  Four-year overall survival and local control rates were 24.9 and 74.3%, respectively. No prognostic factor was found to affect patient survival or local progression. One patient developed a severe radiation-related toxicity, but recovered completely after treatment.
  
  
  CONCLUSIONS
  SBRT for pelvic recurrence was found to be comparable with other modalities with respect to overall survival and complication rates. Further studies are needed to confirm these preliminary results.
authors: Department of Radiation Oncology, Korea Cancer Center Hospital, Korea Institute of Radiological and Medical Sciences, Nowon-Gu, Seoul, Republic of Korea. mskim@kcch.re.kr
authors: Mi-Sook
authors: MS
authors: Kim
authors: ChulWon
authors: C
authors: Choi
authors: SungYul
authors: S
authors: Yoo
authors: ChulKoo
authors: C
authors: Cho
authors: YoungSeok
authors: Y
authors: Seo
authors: YoungHoon
authors: Y
authors: Ji
authors: DongHan
authors: D
authors: Lee
authors: DaeYong
authors: D
authors: Hwang
authors: SunMi
authors: S
authors: Moon
authors: Min Suk
authors: MS
authors: Kim
authors: HyeJeong
authors: H
authors: Kang
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D018572:Disease-Free Survival; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008207:Lymphatic Metastasis; D008297:Male; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local / Q000601:surgery*; D010386:Pelvic Neoplasms / Q000601:surgery*; D011379:Prognosis; D016634:Radiosurgery; D012004:Rectal Neoplasms / Q000601:surgery*; D012189:Retrospective Studies; D015996:Survival Rate; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome