SCENIC International Consensus Statement on Surveillance and Management of Dysplasia in Inflammatory Bowel Disease

摘要

Patients with ulcerative colitis or Crohn's colitis have an increased risk of colorectal cancer (CRC). Most cases are believed to arise from dysplasia, and surveillance colonoscopy therefore is recommended to detect dysplasia. Detection of dysplasia traditionally has relied on both examination of the mucosa with targeted biopsies of visible lesions and extensive random biopsies to identify invisible dysplasia. Current U.S. guidelines recommend obtaining at least 32 random biopsy specimens from all segments of the colon as the foundation of endoscopic surveillance.(1-4) However, much of the evidence that provides a basis for these recommendations is from older literature, when most dysplasia was diagnosed on randombiopsies of colon mucosa.(5) With the advent of video endoscopy and newer endoscopic technologies, investigators now report that most dysplasia discovered in patients with inflammatory bowel disease (IBD) is visible.(6,7) Such a paradigm shift may have important implications for the surveillance and management of dysplasia. The evolving evidence regarding newer endoscopic methods to detect dysplasia has resulted in variation among guideline recommendations from organizations around the world.(1-4,8-10) We therefore sought to develop unifying consensus recommendations addressing 2 issues: (1) How should surveillance colonoscopy for detection of dysplasia be performed? (2) How should dysplasia identified at colonoscopy be managed?