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Small intestine diagram including the jejunum. Jejunitis is inflammation of the lining of the middle section of the small intestine. [1] It is characterized by severe abdominal pain, vomiting containing bile, and foul smelling loose stools. [2] Acute jejunitis comes on suddenly and usually only lasts a few days.
Crohn's disease – also known as regional enteritis, it can occur along any surface of the gastrointestinal tract. The most common location for Crohn's disease to manifest, with or without the involvement of the colon or other parts of the GI tract, is in the terminal ileum (the final segment of the small intestine). [5]
The association between inflammatory conditions of the eye and Crohn's disease is due to many Crohn's disease patients having genetic markers such as HLA-B07, HLA-B27 and HLA-DRB1*0103. [57] Additionally, cytokines IL-6, IL-10, and IL-17 which are produced in the bowel enter the circulatory system and travel to the eyes to trigger inflammation ...
T-cell mediated inflammation is thought to be driven by the JAK-STAT intracellular T-cell signaling pathway, leading to the transcription, translation and release of inflammatory cytokines. This T-cell JAK-STAT signaling is inhibited by the medications tofacitinib , filgotinib and upadacitinib which are used in the treatment of ulcerative colitis.
The condition is usually caused by Gram-positive enteric commensal bacteria of the gut (). Clostridioides difficile is a species of Gram-positive bacteria that commonly causes severe diarrhea and other intestinal diseases when competing bacteria are wiped out by antibiotics, causing pseudomembranous colitis, whereas Clostridium septicum is responsible for most cases of neutropenic enterocolitis.
Lymphangiectasia, also known as "lymphangiectasis", [1] is a pathologic dilation of lymph vessels. [2] When it occurs in the intestines it is known as intestinal lymphangiectasia, colloquially recognized as Waldmann's disease in cases where there is no secondary cause. [3]
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Enterocolitis is an inflammation of the digestive tract, involving enteritis of the small intestine and colitis of the colon. [1] It may be caused by various infections, with bacteria, viruses, fungi, parasites, or other causes.