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Division of Medical Oncology, Department of Internal Medicine, The Arthur G. James Cancer Hospital and Richard J. Solove Research Institute, The Ohio State University Comprehensive Cancer Center, Columbus, OH 43210, USA.

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Background: Immune checkpoint inhibitors (ICI) target microsatellite instability-high (MSI-H) tumors with success. The incidence and characteristics of ICI-related colitis (IMC) in patients with MSI-H colorectal cancers (CRC) are unclear.

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