title: [Factors affecting the prognosis and selection of local excision for low rectal cancer].
abstract: OBJECTIVE
  To investigate the factors affecting the result and selection of local excision for low rectal cancer.
  
  
  METHODS
  The clinical data of 101 patients with low rectal cancer treated by local excision were retrospectively analyzed. Survival was estimated using the Kaplan-Meier. The factors influencing on the survival were analyzed using univariate (Log rank) and multivariate (Cox model) analysis methods.
  
  
  RESULTS
  Of 101 patients in this series, 91 patients underwent transanal excision, 9 had transsacral excision, 1 recieved transvaginal excision. Postopertative complication developed in 6 patients (5.9%). No death occurred within 30 postoperative days. Five T4 patients underwent preoperative radiotherapy, and 34 received postoperative radiotherapy. The overall 5-year survival rate was 91.0% for the whole group, and it was 100%, 92.6%, 77.1%, 83.3% for patients with Tis, T1, T2, and T3/T4 lesion, respectively. The incidence of local recurrence was 15. 8%. Univariate analysis revealed that pathological T stage, tumor size (> 3 cm), lymphovascular invasion, ulcerative lesion, adjuvant radiotherapy and local recurrence were significant factors affecting the survival (P <0.05). However, by multivariate analysis, only tumor size ( > 3 cm) and local recurrence were found to be the significant prognostic predictors.
  
  
  CONCLUSIONS
  The important selection criteria for local excision in the treatment of low rectal cancer may include T1 stage, well or moderate differentiation,tumor size < or = 3 cm, no lymphovascular invasion.
authors.affiliation: Department of Abdominal Surgical Oncology, Cancer Hospital (Institute), Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China.
authors.forename: Jian-Wei
authors.initials: JW
authors.lastname: Hang
authors.forename: Zhi-Xiang
authors.initials: ZX
authors.lastname: Zhou
authors.forename: Yong-Qiang
authors.initials: YQ
authors.lastname: Bu
authors.forename: Xiao-Feng
authors.initials: XF
authors.lastname: Bai
authors.forename: Xiang
authors.initials: X
authors.lastname: Wang
authors.forename: Ping
authors.initials: P
authors.lastname: Zhao
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003131:Combined Modality Therapy; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D053208:Kaplan-Meier Estimate; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D009364:Neoplasm Recurrence, Local; D009367:Neoplasm Staging; D011379:Prognosis; D018714:Radiotherapy, Adjuvant; D012004:Rectal Neoplasms / Q000473:pathology / Q000532:radiotherapy / Q000601:surgery*; D012007:Rectum / Q000473:pathology / Q000528:radiation effects / Q000601:surgery*; D012189:Retrospective Studies