Long-Term Evolution of Disease Behavior of Crohn's Disease

TLDR

Crohn’s disease is classified into stricturing, penetrating, and inflammatory behavior according to the Vienna classification. The study aimed to evaluate the long‑term evolution of Crohn’s disease behavior and identify predictive factors and prognostic implications of stricturing or penetrating complications in a large retrospective cohort. The authors retrospectively examined 2,002 CD patients and prospectively followed 646 patients with >5‑year disease duration, classifying them by prior behavior and tracking the development of stricturing or penetrating complications. Over 20 years, 12 % of patients remained inflammatory, 18 % developed stricturing, and 70 % developed penetrating disease; the initial lesion location was the primary predictor of complication type and timing, while disease activity and treatment needs remained similar across behavioral subgroups, indicating that most patients eventually experience stricturing or perforating complications regardless of prior classification.

Abstract

The Vienna classification of Crohn's disease (CD) distinguishes three patient subgroups according to disease behavior: stricturing, penetrating, and inflammatory. Our aim was to assess the long-term evolution of the disease behavior of CD and to determine the predictive factors and prognostic implications of this evolution.Occurrence and predictive factors of a stricturing and/or a penetrating complication were searched for in 2,002 patients with CD studied retrospectively. In addition, the 1995-2000 disease course was assessed prospectively in a cohort of 646 patients with disease duration >5 years, classified according to their previous disease behavior.1,199 patients (60%) developed a stricturing (n = 254) or a penetrating (n = 945) complication. Twenty-year actuarial rates of inflammatory, stricturing, and penetrating disease were 12, 18, and 70%, respectively. The initial location of lesions was the main determinant of the time and type of the complication. In the cohort study, year-by-year activity and therapeutic requirements did not show significant sustained differences between behavioral subgroups.Most patients with CD will eventually one day develop a stricturing or a perforating complication. Initial location determines the type of the complication. Classification of patients into a behavioral group from previous history has no impact upon activity during the following years.