Prolonged small vessel vasculitis with colon mucosal inflammation as first manifestations of Behçet’s disease

Figure 5 Sigmoid colon mucosal biopsy revealed chronic nonspecific colitis (A, B: HE stain, 100 ×; C, D: HE stain, 200 ×). The image shows formation of granulation tissue, lymphoid hyperplasia, and infiltration of plasma cells, neutrophils, and monocytes into the mucosa. Increased blood vessels with hyaline degeneration and thickening vessel wall are seen. Lymphocytes surround the wall of the submucosal venules, especially in the deeper parts.