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DOWNLOAD PDFAlthough ulcerative colitis is not considered an autoimmune disease, there are associations with autoimmunity and thought to result from a mixture of defects in host interactions with intestinal microbiota, epithelial dysfunction, and aberrant mucosal immune responses.
The inflammation of ulcerative colitis only extends to the mucosal and submucosal layers as opposed to Crohn's disease which is characterized by transmural inflammation.
Grossly, ulcerative colitis always involves the rectum and expands proximally in a stepwise fashion to involve all or a part of the colon.
Grossly, ulcerative colitis always involves the rectum and expands proximally in a stepwise fashion to involve all or a part of the colon.
Affected areas of the colon can demonstrate broad-based ulcers and regions of regenerating mucosa that can bulge into the lumen creating friable pseudopolyps.
An intestinal crypt is an epithelial gland lining the small intestine and colon and plays an important role in the formation of new epithelium. The basal portions of the crypt contain multipotent stem cells that differentiate and migrate up the side of the crypt and eventually into the villus. Abscesses in these regions are highly characteristic of ulcerative colitis and can lead to mucosal ulcerations.
In the colon, haustra are small pouches outlined by taenia coli that give the colon its segmented appearance. Chronic inflammation can cause the colon to become thickened and stiff and can lead to shortening of the colon with atrophic mucosa and loss of haustral folds.
In the colon, haustra are small pouches outlined by taenia coli that give the colon its segmented appearance. Chronic inflammation can cause the colon to become thickened and stiff and can lead to shortening of the colon with atrophic mucosa and loss of haustral folds.
The most common symptoms of ulcerative colitis include relapsing attacks of bloody diarrhea with mucous and pus and cramping lower abdominal pain. Chronic disease can lead to anorexia, weight loss, and even growth retardation.
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