title: Comparison between straight and J-pouch coloanal anastomoses in surgery for rectal cancer.
abstract: OBJECTIVE
  This study was designed to compare the long-term results of straight and J-pouch coloanal anastomoses after resection of rectal cancers located in the critical position of 5-6cm from the anal verge.
  
  
  METHODS
  The subjects of this study were 81 patients who underwent radical resection of rectal cancers located 5-6 cm from the anal verge, followed by straight or J-pouch coloanal anastomosis, performed in 41 and 40 patients, respectively. Careful clinical and manometric follow-up was conducted and the results were compared.
  
  
  RESULTS
  There were no differences in the incidence of local recurrence, the disease-free survival rate, postoperative stool frequency, continence, sphincter pressures, or functional length between the two groups. Both groups had a high incidence of clustering or fragmented defecation; however, the J-pouch patients had better urgency control, a greater capacity before feeling the urge to defecation, superior rectal tolerance, and better compliance.
  
  
  CONCLUSIONS
  Both straight and J-pouch coloanal anastomoses are oncologically and functionally acceptable for the treatment of rectal cancer located 5-6cm from the anal verge, but the J pouch has slight superiority in urgency control, as a result of larger urge threshold and tolerable volume, and better compliance. The reason for the high incidence of clustering defecation in both groups needs to be investigated.
authors.affiliation: Department of Surgery, National Yang-Ming University, Taipei Veterans General Hospital, Taiwan.
authors.forename: Jen-Kou
authors.initials: JK
authors.lastname: Lin
authors.forename: Huang-Sheng
authors.initials: HS
authors.lastname: Wang
authors.forename: Shung-Haur
authors.initials: SH
authors.lastname: Yang
authors.forename: Jeng-Kae
authors.initials: JK
authors.lastname: Jiang
authors.forename: Wei-Shone
authors.initials: WS
authors.lastname: Chen
authors.forename: Tzu-Chen
authors.initials: TC
authors.lastname: Lin
mesh_terms: D000368:Aged; D000714:Anastomosis, Surgical / Q000379:methods*; D018572:Disease-Free Survival; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008365:Manometry; D008875:Middle Aged; D011183:Postoperative Complications; D012004:Rectal Neoplasms / Q000601:surgery*; D016896:Treatment Outcome