Table 2.

Two computed tomography (CT) patterns of immune-mediated colitis.

Diffuse Colitis	Segmental Colitis
Diffuse colonic wall thickening Mucosal hyperenhancement Mesenteric vessel engorgement With or without fluid filled distended colon	Segmental colonic wall thickening Pericolic fat stranding Mucosal hyperenhancement Mesenteric vessel engorgement Often superimposed to diverticulitis, named also “segmental colitis associated with diverticulosis”, characterized by mild systemic symptoms and absence of fecal bacterial/leukocyte