Fig. 2

Different patients with history of pathologically proved Crohn’s disease. A Coronal CT in arterial phase showing diffuse mural thickening at the terminal ileum with mucosal hyperenhancement (green arrows) and submucosal edema (red arrows). B CT coronal MIP in arterial phase showing terminal ileal mural thickening with mucosal hyperenhancement (white arrow) and submucosal edema (blue arrow), surrounding congested vasa recta ‘comb sign’ (green arrows) and few reactive lymph nodes (red arrow head) with entero-cutaneous fistula (yellow arrow head) ending in terminal ilium after injection of positive contrast through the fistulous tract. C Axial CT in arterial phase showing small bowel skip lesions (red arrow heads) in between apparently normal bowel loops (green arrow heads). D Axial CT in arterial phase shows abscess formation (white arrow heads) in between inflamed ileal loops (white arrows). E Histopathology image showing focal mucosal ulceration with lymphocytic infiltration involving mucosa and submucosa (arrow)