Small bowel vasculitis? what a gastroenterologist should know - from diagnosis to management.

Purpose of review: This article provides gastroenterologists with an overview of small bowel involvement in systemic vasculitis. Though various vasculitides can impact the small bowel, we highlight those with a more frequent and clinically significant GI involvement.

Recent findings: Recent advances, including increased accessibility to cross-sectional imaging, capsule endoscopy and device-assisted enteroscopy, have improved detection of gastrointestinal manifestations in systemic vasculitis. Studies have also explored the genetic and inflammatory pathways involved in these diseases, although high-quality evidence on diagnosis and treatment remains limited, leading to reliance on expert consensus.

Summary: Small bowel involvement is common in Behçet's disease and small vessel vasculitis, presenting with symptoms ranging from mild to severe, including massive bleeding, ischemia, and perforation, often indicating a poorer prognosis. Diagnosis is challenging, but in patients with a known or suspected history of vasculitis, it should prompt contrast-enhanced abdominal imaging and endoscopic evaluation. Treatment decisions should be made collaboratively by a multidisciplinary team, with immunosuppressive therapy remaining the cornerstone.