Clinical Challenges and Complications of IBD

Miguel D Regueiro, MD; Jason Swoger, MD MPH

Chapter 2: Internal Fistula, Abscesses, And Strictures: Evaluation With Novel Radiographic Techniques and Clinical Management (continued)

Peter D.R. Higgins, MD, PhD, MSc

Crohn’s disease (CD) is classified into inflammatory (B1, nonpenetrating, nonstricturing), stricturing (B2, stenotic), and penetrating (B3, fistulas and/or abscesses) disease.1 Although this is the standard Montreal classification, the stricturing and penetrating categories have significant overlap; most fistulas/penetrating complications arise upstream from a stenosis.2,3 Epidemiologic data on the prevalence of stricturing disease demonstrate a correlation with disease duration, in that, after a decade of disease, approximately one-third of patients with CD will have developed a…