Institutional members access full text with Ovid®

Share this article on:

A Study into External Rectal Anatomy: Improving Patient Selection for Radiotherapy for Rectal Cancer

Memon, Sameer M.B.Ch.B.1; Keating, John P. M.B.B.S., F.R.C.S., F.R.A.C.S.1; Cooke, Hugh S. M.B.Ch.B., F.R.A.C.S.2; Dennett, Elizabeth R. M.Med.Sci., F.R.A.C.S.1

Diseases of the Colon & Rectum: January 2009 - Volume 52 - Issue 1 - p 87-90
doi: 10.1007/DCR.0b013e3181973a91
Original Contributions

PURPOSE: This study was designed to determine the distance from the anal verge to the anterior peritoneal reflection in vivo, thereby improving the selection of patients for preoperative radiotherapy.

METHODS: Measurement of the distance from the anal verge to the anterior peritoneal reflection, confluence of the taenia, and the origin of the sigmoid mesentery in 50 patients in the lithotomy position.

RESULTS: The mean distance from the anal verge to the anterior peritoneal reflection was 11.9 cm (men) and 10 cm (women). To the origin of the sigmoid mesentery, the measurements were 18.8 cm (men) and 19.1 cm (women) and to the confluence of the taenia coli, 20.3 cm (men) and 18.8 cm (women).

CONCLUSIONS: The distance from the anal verge to the origin of the sigmoid mesentery was approximately 19 cm in both men and women. Below this level tumors have limited mobility and should be amenable to radiotherapy.

1 Department of Surgery and Anaesthesia, School of Medicine and Health Sciences, University of Otago Wellington, Wellington, New Zealand

2 Department of Surgery, Hutt Hospital, Wellington, New Zealand

Presented at the meeting of the Royal Australasian College of Surgeons, Perth, Australia, May 9 to 13, 2005.

Reprints are not available.

Address of correspondence: Elizabeth R. Dennett, M.Med.Sci., F.R.A.C.S., Department of Surgery and Anaesthesia, School of Medicine and Health Sciences, University of Otago Wellington, P.O. Box 7343, Wellington 6242, New Zealand. E-mail: liz.dennett@otago.ac.nz

© The ASCRS 2009