ascending colon


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Related to ascending colon: descending colon

as·cend·ing co·lon

[TA]
the portion of the colon between the ileocecal orifice and the right colic flexure.
Synonym(s): colon ascendens [TA]

ascending colon

the segment of the colon that extends up the cecum in the lower right side of the colic fissure to the abdomen to the transverse colon at the hepatic flexure on the right side.

ascending colon

The first segment of the colon, which begins in the right lower quadrant of the abdomen at the caecum and ends at the hepatic (right colic) flexure in the right upper quadrant of abdomen, after which point it becomes the transverse colon.
Arterial supply Right colic artery, a branch of the superior mesenteric artery.
Venous supply Right colic and ileocolic veins of the superior mesenteric vein.

as·cend·ing co·lon

(ă-send'ing kō'lŏn) [TA]
The portion of the colon between the ileocecal orifice and the right colic flexure.

ascending colon

The part of the large intestine on the right side, running up from the CAECUM to the bend near the liver.

colon

the part of the large intestine extending from the cecum to the rectum. It has the same basic design in all species. There is an ascending colon which begins at the cecum, passes forward to the cranial part of the abdominal cavity then crosses to the left side as the transverse colon. It then turns caudally again to become the descending colon. In the caudal abdomen the colon curves to the midline and joins the rectum. See also colonic.
In herbivores and omnivores there is a variation on this general plan in that the ascending colon is greatly lengthened. In the ruminants and the pig this takes the form of a spiral colon of centrifugal and centripetal loops which occupies the right side of the abdomen. In the horse the ascending colon forms an uncoiled loop reflexed upon itself, beginning at the cecum as the right ventral colon, passing to the left ventral, to the left dorsal at the pelvic flexure, then to the right dorsal, then back into the standard pattern at the transverse colon. In the horse there is the additional oddity of a significant reduction in diameter at the small colon, the terminal part which joins the rectum.

ascending colon
the first segment of the colon which is either a short, cranially directed segment, as in the dog, or greatly expanded to form the spiral colon in ruminants, or the great colon of horses (right ventral, sternal flexure, left ventral, pelvic flexure, left dorsal, diaphragmatic flexure, right dorsal colons).
coiled colon
see spiral colon (below).
descending colon
the third and last of the three main divisions of the colon which runs caudally and terminates in the rectum. It is not extensive in the horse, in which it has an unusually long mesentery and is known as the small colon.
floating colon
small or descending colon in horses.
irritable colon syndrome
stress and psychological factors can cause the frequent passage of soft to watery feces, often with mucus, in dogs. Called also mucous colitis, spastic colon, psychologically induced colitis, and irritable bowel. See also spasmodic colic.
large colon
the ascending colon of the horse.
left colon displacement colic
forward displacement of the left dorsal colon is an uncommon cause of moderate colic in the horse. Characteristic findings include a palpable medial displacement of the spleen and the absence of the pelvic flexure of the colon from its usual site in front of the pelvis. Surgical removal of the displaced colon from its entrapment across the top of the gastrosplenic ligament is the only effective treatment.
short colon
see descending colon (above).
redundant colon
extra bends in the descending colon. Seen on x-rays, especially in large breed dogs.
small colon
see descending colon (above).
spiral colon
ascending colon of ruminants.
References in periodicals archive ?
Not only is ENTOCORT EC a highly effective treatment for mild to moderate flare-ups, involving the ileum and ascending colon, but it also has a good tolerability profile, making this treatment option attractive for both physicians and patients alike.
16) Turkey 1 2000 CDC (17) USA 2 Y Disease location Treatment Outcome 1970 Stomach Antibiotics Died 1977 Unspecified Antibiotics Survived 1980 Ascending colon Surgery Survived 1984 Unspecified Unspecified 3 died 1984 Unspecified Antibiotics 9 died 1985 Unspecified Antibiotics Died 1990 Unspecified Antibiotics Unspecified 1990 Stomach Antibiotics I died 1995 Unspecified Antibiotics Died 1997 Cecum and ascending colon Surgery Survived 2000 Unspecified Antibiotics Survived (a) Internal includes inhalational anthrax, gastrointestinal anthrax, anthrax meningitis, and septicemia; CDC, Centers for Disease Control and Prevention.
Comment: In patients with mild to moderate active Crohn's of the ileum and/or ascending colon, 48%-69% improved with Entocort in five studies, vs.
The predominance of the colon cancers that occur are what we consider to be right-sided colon cancers, occurring in the cecum area or the ascending colon section, though we don't really know the reason for that, yet.
assessed overall colon cleansing, ascending colon cleansing and adverse events in all patients.
capsules (3 mg) are a first-line locally acting glucocorticosteroid therapy indicated for the induction of remission of mild to moderate active Crohn's disease involving the ileum and/or the ascending colon and maintenance of remission.
The ascending colon was completely free on thorough examination.
The reasons for this herniation remain unclear, although several predisposing factors have been postulated by Moynihan: (a) a long or excessively mobile mesentery, (b) excessively large Foramen of Winslow, (c) absence of fusion of ascending colon to posterior abdominal wall [4].
The most common sites of involvement are the sigmoid colon, the descending colon, and the ascending colon (in order of decreasing frequency).
1 The intestinal distribution of the fat halo sign in these patients was the terminal ileum (4%), ascending colon (28%), transverse colon (34%), descending colon (36%), sigmoid colon (14%) and rectum (10%).
They found that all 14 cancers were adenocarcinomas, 2 of which were located in the cecum; 5 were in the ascending colon, 4 were in the transverse colon, and 3 were in the rectosigmoid colon.
At surgery it was found that his small bowel was matted together with nodules of malignant tissue; the caecum, ascending colon and proximal transverse colon were also involved.

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