# Diversion colitis
> Mediated Wiki article. Canonical URL: https://mediated.wiki/source/Diversion_colitis
> Markdown URL: https://mediated.wiki/source/Diversion_colitis.md
> Source: https://en.wikipedia.org/wiki/Diversion_colitis
> Source revision: 1174096862
> License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/)
{{Infobox medical condition (new)
| name = Diversion colitis
| synonyms =
| image = Diversion proctitis - intermed mag.jpg
| width =
| caption = [Micrograph](/source/Micrograph) showing colonic-type mucosa with follicular lymphoid hyperplasia, as is seen in diversion colitis. [H&E stain](/source/H%26E_stain).
| pronounce =
| field = [Gastroenterology](/source/Gastroenterology)
| symptoms =
| complications =
| onset =
| duration =
| types =
| causes = Surgery with diversion of colon ([ileostomy](/source/ileostomy) or [colostomy](/source/colostomy))
| risks =
| diagnosis =
| differential =
| prevention =
| treatment = Short-chain fatty acid enemas
| medication = [Mesalazine](/source/Mesalazine)
| prognosis =
| frequency =
| deaths =
}}
'''Diversion colitis''' is an [inflammation](/source/inflammation) of the colon which can occur as a complication of [ileostomy](/source/ileostomy) or [colostomy](/source/colostomy), where symptoms may occur between one month and three years following surgery.[{{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 }}] It also occurs frequently in a [neovagina](/source/neovagina) created by [colovaginoplasty](/source/colovaginoplasty), with varying delay after the original procedure.[{{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 }}] 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](/source/rectal_discharge) and rectal bleeding that develops from the inflamed [mucosa](/source/mucosa) of the distal, unused colon.[{{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 }}]
==Treatment==
In many milder cases after [ileostomy](/source/ileostomy) or colostomy, diversion colitis is left untreated and disappears naturally. Possible pharmacologic treatments include [short-chain fatty acid](/source/short-chain_fatty_acid) irrigation, [steroid](/source/Corticosteroid) [enema](/source/enema)s and [mesalazine](/source/mesalazine).[{{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=}}] For surgical candidates, [reanastomosis](/source/Surgical_anastomosis) is a reversal procedure carried out to restore bowel continuity that effectively halts the symptoms of diversion colitis.