Fifty shades of chronic colitis: non-infectious imposters of inflammatory bowel disease

Chronic colitis is a common injury pattern that invokes a wide range of etiologic considerations. Any process that causes chronic mucosal injury can result in this nonspecific injury pattern. Inflammatory bowel disease is among the differential diagnoses, but it should only be rendered in the appropriate setting, after all possible mimics have been reasonably excluded. This review will detail the landscape of non-infectious IBD imposters.