Endoscopic biopsy specimen from right colon showing changes compatible with Crohn disease. A. Colon mucosa with crypt atrophy and irregularity, and lymphoid hyperplasia (H&E, bar = 1 mm). B. Higher magnification revealing crypt destruction and in the lamina propria severe accumulation of lymphocytes and plasma cells as well as a single small epithelioid cell granuloma (inset) (H&E, bar = 200 μm).
Larsen et al. Diagnostic Pathology 2012 7:100 doi:10.1186/1746-1596-7-100