title: Coloanal anastomosis in surgery for rectal cancer.
abstract: The definition of coloanal anastomosis should be based on anatomy of the anal canal. The anal canal is terminal portion of the digestive tract and comprises muscle tube of approximately 3 cm long with a lumen coated with several types of mucosa or epithelium. Muscle tube of the anal canal consists of two layers, inner sphincter muscle and external sphincter muscle. The former is a continuation of rectal muscle layer and the latter extends to the levator ani muscle. Colo-anal anastomosis (CACA): whole of the rectum is excised with a separation line placed just above the anal canal. An anastomosis is made between colonic cut end and upper limit of the anal canal. Colo-anus anastomosis in a narrow sense (CAA): rectum is excised with a bit of upper part of the anal canal. Then an anastomosis is made inside the anal canal.
authors: Surgical Department of Cancer Institute Hospital, Tokyo.
authors: T
authors: T
authors: Takahashi
authors: H
authors: H
authors: Ohta
authors: K
authors: K
authors: Azekura
authors: M
authors: M
authors: Ueno
mesh_terms: D001003:Anal Canal / Q000601:surgery*; D000714:Anastomosis, Surgical; D003106:Colon / Q000601:surgery*; D013505:Digestive System Surgical Procedures / Q000379:methods; D006801:Humans; D009364:Neoplasm Recurrence, Local; D011183:Postoperative Complications; D012004:Rectal Neoplasms / Q000601:surgery*; D012007:Rectum / Q000601:surgery