AGA Technical Review on Perianal Crohn's Disease

This report is a technical review of the normal anatomy, definitions, etiology, classification, epidemiology, diagnosis, disease activity assessment, and medical and surgical treatment of perianal Crohn’s disease. Although descriptions of surgical therapy are provided along with the indications, outcomes, and complications of surgical intervention, the reader is cautioned that this review is not meant to provide the details of how to perform the specific individual surgical procedures.