Full bowel preparation is avoided in all, except:

Ans. (a) Carcinoma colonRef: Sabiston 19th edition, Pages 1308-1309Bowel Preparation for Colon Study (Colonoscopy/Barium Enema):* Bowel preparation is not done in ulcerative colitis, irritable bowel syndrome and Hirschsprung's disease (HD) to study the colonic status and fecal pattern in these diseases* For example, IBS can be aggravated by bowel preparation, HD can be misdiagnosed if bowel preparation is done before barium enema and ulcerative colitis the typical haustration loss can be identified if done without preparation.* Bowel preparation is must for carcinoma colon for complete study of colon and to Rule out synchronous lesions and to take biopsy.Note: Bowel preparation is not needed for left colon surgeries as per recent advance. The studies say that the incidence of leak and other morbidity and mortality are same in both bowel prepared and unprepared groups