{{Infobox medical condition (new) | name = Diversion colitis | synonyms = | image = Diversion proctitis - intermed mag.jpg | width = | caption = Micrograph showing colonic-type mucosa with follicular lymphoid hyperplasia, as is seen in diversion colitis. H&E stain. | pronounce = | field = Gastroenterology | symptoms = | complications = | onset = | duration = | types = | causes = Surgery with diversion of colon (ileostomy or colostomy) | risks = | diagnosis = | differential = | prevention = | treatment = Short-chain fatty acid enemas | medication = Mesalazine | prognosis = | frequency = | deaths = }} '''Diversion colitis''' is an inflammation of the colon which can occur as a complication of ileostomy or colostomy, where symptoms may occur between one month and three years following surgery.<ref name="pmid29713128">{{cite journal | vauthors = Tominaga K, Kamimura K, Takahashi K, Yokoyama J, Yamagiwa S, Terai S | title = Diversion colitis and pouchitis: A mini-review | journal = World Journal of Gastroenterology | volume = 24 | issue = 16 | pages = 1734–1747 | date = April 2018 | pmid = 29713128 | pmc = 5922993 | doi = 10.3748/wjg.v24.i16.1734 | doi-access = free }}</ref> It also occurs frequently in a neovagina created by colovaginoplasty, with varying delay after the original procedure.<ref name="pmid26632208">{{cite journal | vauthors = van der Sluis WB, Bouman MB, Meijerink WJ, Elfering L, Mullender MG, de Boer NH, van Bodegraven AA | title = Diversion neovaginitis after sigmoid vaginoplasty: endoscopic and clinical characteristics | journal = Fertility and Sterility | volume = 105 | issue = 3 | pages = 834–839.e1 | date = March 2016 | pmid = 26632208 | doi = 10.1016/j.fertnstert.2015.11.013 | doi-access=free }}</ref> Despite the presence of a variable degree of inflammation the most suggestive histological feature remains the prominent lymphoid aggregates.
==Symptoms and signs== People may be asymptomatic but common symptoms are abdominal discomfort, anorectal pain, mucous discharge and rectal bleeding that develops from the inflamed mucosa of the distal, unused colon.<ref name="pmid29713128"/>
==Diagnosis== Diagnosis is aided by knowing the full clinical history.<ref name="pmid23577987">{{cite journal | vauthors = Haboubi, Haboubi | title = Reporting colonic mucosal biopsies in inflammatory conditions: a new approach | journal = Colorectal Disease | volume = 2 | issue = 2 | pages = 66–72 | date = April 2000 | pmid = 23577987 | doi = 10.1046/j.1463-1318.2000.00104.x| s2cid = 40271111 }}</ref>
==Treatment== In many milder cases after ileostomy or colostomy, diversion colitis is left untreated and disappears naturally. Possible pharmacologic treatments include short-chain fatty acid irrigation, steroid enemas and mesalazine.<ref>{{cite journal |doi=10.1136/gut.32.9.1020|vauthors=Geraghty JM, Talbot IC |title=Diversion colitis: histological features in the colon and rectum after defunctioning colostomy |journal=Gut |volume=32 |issue=9 |pages=1020–3 |date=September 1991 |pmid=1916483 |pmc=1379042 |url=}}</ref> For surgical candidates, reanastomosis is a reversal procedure carried out to restore bowel continuity that effectively halts the symptoms of diversion colitis.<ref name="pmid29713128"/>
== References == {{reflist}}
Category:Colitis Category:Diseases of intestines Category:Gastrointestinal tract disorders