Your diarrhoea can be because of both conditions. Right hemicolectomy
generally does not produce diarrhoea. However, it is more likely that you
have inflammatory bowel disease and this should be excluded by a repeat
colonoscopy and biopsy from the remaining colon. The transverse colon is a
very unusual site for ischaemic large bowel stricture. Loperamide is very
well tolerated over a long period of time. Treatment should be planned after
repeat colonoscopy.