ascending colon


Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.
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 ?
Abdominal X-ray showing a great number of intensive shadows in the area of the ascending colon and the rectum Slika 1.
Lesions involved the cecum and ascending colon are thought to reflect a genetic predisposition.
b) Macroscopic appearance of the resected ascending colon and adjacent mesenteric cyst in the mesenteric fat.
Highly advanced SSA/Ps (SSA/ P-HGD and SSA/P-ACA) are also most commonly found in the cecum and ascending colon.
There are two prerequisites for cecal volvulus to occur, a segment of mobile cecum and ascending colon and a point of fixation about which torsion may occur.
11 Gastrointestinal involvement is the most common presentation, with infiltration of the wall of the ileocaecal region, appendix and ascending colon being most frequent.
7-cm x 2-cm ovoid fatty mass with a 2-mm hyper-attenuating ring and a central area of hyperattenuation projecting from the ascending colon (Figure 2).
A computed tomographic (CT) scan of her abdomen and pelvis was arranged, which showed abnormal areas of low attenuation and multiple pockets of air in the right flank, surrounding the right kidney and in the right sub-hepatic space, consistent with a perforation of either the ascending colon or the duodenum (Fig.
ascending colon (7 cases), descending colon (5 cases), sigmoid colon (10 cases), rectum (14 cases), transverse colon (2 cases) and cecum (2 cases).
So the positions of the vermiform appendix are as follows: (a) retro caecal and retro colic passes retro peritoneally behind the caecum and ascending colon, (b) pelvic the tip of appendix passes downwards and medially, crosses right pelvic brim, (c) splenic or ileal type tip of the appendix passes upwards and medially in front or behind the terminal part of the ileal (pre or post ileal) (d) subcaecal and paracolic lies below caecum and tip ascends by the side of the ascending colon, and (d) midinguinal very rare type and tip of the appendix is directed vertically downwards.
The ascending colon is also subject to ischemic attacks-in cases of absence or insufficient development of the artery of Drummond (Gandhi et al.

Full browser ?