Sigmoid colon

Jump to navigation Jump to search

Template:Infobox Anatomy

WikiDoc Resources for Sigmoid colon

Articles

Most recent articles on Sigmoid colon

Most cited articles on Sigmoid colon

Review articles on Sigmoid colon

Articles on Sigmoid colon in N Eng J Med, Lancet, BMJ

Media

Powerpoint slides on Sigmoid colon

Images of Sigmoid colon

Photos of Sigmoid colon

Podcasts & MP3s on Sigmoid colon

Videos on Sigmoid colon

Evidence Based Medicine

Cochrane Collaboration on Sigmoid colon

Bandolier on Sigmoid colon

TRIP on Sigmoid colon

Clinical Trials

Ongoing Trials on Sigmoid colon at Clinical Trials.gov

Trial results on Sigmoid colon

Clinical Trials on Sigmoid colon at Google

Guidelines / Policies / Govt

US National Guidelines Clearinghouse on Sigmoid colon

NICE Guidance on Sigmoid colon

NHS PRODIGY Guidance

FDA on Sigmoid colon

CDC on Sigmoid colon

Books

Books on Sigmoid colon

News

Sigmoid colon in the news

Be alerted to news on Sigmoid colon

News trends on Sigmoid colon

Commentary

Blogs on Sigmoid colon

Definitions

Definitions of Sigmoid colon

Patient Resources / Community

Patient resources on Sigmoid colon

Discussion groups on Sigmoid colon

Patient Handouts on Sigmoid colon

Directions to Hospitals Treating Sigmoid colon

Risk calculators and risk factors for Sigmoid colon

Healthcare Provider Resources

Symptoms of Sigmoid colon

Causes & Risk Factors for Sigmoid colon

Diagnostic studies for Sigmoid colon

Treatment of Sigmoid colon

Continuing Medical Education (CME)

CME Programs on Sigmoid colon

International

Sigmoid colon en Espanol

Sigmoid colon en Francais

Business

Sigmoid colon in the Marketplace

Patents on Sigmoid colon

Experimental / Informatics

List of terms related to Sigmoid colon


Overview

The sigmoid colon (pelvic colon; sigmoid flexure) forms a loop which averages about 40 cm. in length, and normally lies within the pelvis, but on account of its freedom of movement it is liable to be displaced into the abdominal cavity.

Path

It begins at the superior aperture of the lesser pelvis, where it is continuous with the iliac colon, and passes transversely across the front of the sacrum to the right side of the pelvis.

It then curves on itself and turns toward the left to reach the middle line at the level of the third piece of the sacrum, where it bends downward and ends in the rectum. According to Isaac Asimov's book The Human Body, the name sigmoid means "S-shaped."

Coverings

It is completely surrounded by peritoneum, which forms a mesentery (sigmoid mesocolon), which diminishes in length from the center toward the ends of the loop, where it disappears, so that the loop is fixed at its junctions with the iliac colon and rectum, but enjoys a considerable range of movement in its central portion.

Relations

Behind the sigmoid colon are the external iliac vessels, the left Piriformis, and left sacral plexus of nerves.

In front, it is separated from the bladder in the male, and the uterus in the female, by some coils of the small intestine.

Additional images

References


External links

Template:Gray's

Template:Digestive tract

de:Colon sigmoideum sv:Colon sigmoideum

Template:WikiDoc Sources