What is the primary purpose of performing GI endoscopy with biopsy in suspected IBD?

• A. To obtain mucosal biopsies for histopathologic assessment to differentiate IBD from infections or lymphoma.
• B. To remove polyps for cure.
• C. To measure GI motility.
• D. To treat obstruction via dilation.

Answer: (D)

The main purpose of GI endoscopy with biopsy in suspected inflammatory bowel disease is to obtain mucosal tissue for histopathologic assessment to differentiate IBD from infections or lymphoma. Visual inspection during endoscopy can suggest inflammation, but the microscopic features seen on biopsy are what distinguish ulcerative colitis from Crohn’s disease and help rule out infectious or neoplastic processes. Biopsy findings guide diagnosis, prognosis, and treatment decisions, including choices about immunosuppressive therapy or biologics, and they help identify other conditions that mimic IBD. While endoscopy can also be used to remove polyps, measure motility, or dilate strictures, those are not the primary purposes when the goal is to establish or clarify an IBD diagnosis.