Tocilizumab-induced mucosal injury in the terminal ileum mimicking intestinal Behçet's disease: A case report.

Tocilizumab can cause deep ulcerative lesions in the terminal ileum, which may resemble intestinal Behçet's disease. It is important to continuously monitor abdominal symptoms during tocilizumab therapy and aggressively perform colonoscopy when hematochezia or abdominal pain is observed.