Ischemic colitis caused by strict dieting in an 18-year-old female: report of a case.

Ischemic colitis is typically limited to elderly patients who have concomitant disorders such as cardiovascular disease and chronic renal failure, but rarely affects a young person. The patient was an 18-year-old Japanese female who started dieting to obtain a slim figure three months before admission and presented with a two-month history of constipation and a sudden onset of lower abdominal pain and bloody diarrhea. She underwent colonoscopy, which revealed edema, hemorrhages, and several longitudinal shallow ulcers in the descending colon. Stool and blood culture results were negative for pathogens. She improved rapidly within five days without any specific therapies except intravenous hydration and anticholinergic agents, under the diagnosis of ischemic colitis. In this case constipation and dehydration associated with dieting seemed to be responsible for the development of ischemic colitis. We recommend that ischemic colitis should be included in the differential diagnosis of colitis with bleeding, even in patients younger than age 20 who do not have any predisposing factors.