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sigmoid colon
(redirected from Colon, sigmoid)

   Also found in: Medical, Encyclopedia, Wikipedia 0.01 sec.
sigmoid colon
n.
An S-shaped section of the colon between the descending section and the rectum. Also called sigmoid flexure.

sigmoid colon
n
(Life Sciences & Allied Applications / Anatomy) the S-shaped bend in the final portion of the large intestine that leads to the rectum Also called sigmoid flexure
ThesaurusLegend:  Synonyms Related Words Antonyms
Noun1.sigmoid colon - the s-shaped curve between the descending colon and the rectum
large intestine - beginning with the cecum and ending with the rectum; includes the cecum and the colon and the rectum; extracts moisture from food residues which are later excreted as feces
colon - the part of the large intestine between the cecum and the rectum; it extracts moisture from food residues before they are excreted


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The left colon consisted of splenic flexure, descending colon, sigmoid colon, rectosigmoid junction, and the rectal ampulla.
In contrast to the right colon, sigmoid and rectal carcinomas appear to be associated with a higher incidence of osseous metastases, favoring the pelvis and lumbosacral spine.
For all segments of the large intestine that are either incompletely encased (ascending colon, descending colon, sigmoid colon, upper rectum) or not encased (lower rectum) by peritoneum, the radial margin is created by blunt dissection of the retroperitoneal or subperitoneal aspect, respectively, at operation.
 
 
 
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