Systematic review and case series: flexible sigmoidoscopy identifies most cases of checkpoint inhibitor-induced colitis.
Andrew P WrightMarc S PiperShrinivas BishuRyan William StidhamPublished in: Alimentary pharmacology & therapeutics (2019)
Moderate to severe checkpoint inhibitor-induced colitis involves the left colon in the majority of cases (>98%). Sigmoidoscopy should be the initial endoscopic procedure in the evaluation of this condition.