Figure 4b. Sclerosing mesenteritis. (a) Axial CT scan demonstrates a necrotic-cystic mass (arrowheads) in the region of the porta hepatis. (b) Sagittal multiplanar reformatted image shows a low-attenuation soft-tissue mass (M) in the region of the porta hepatis located superior to the hepatic artery (arrowhead), portal vein (arrow), and pancreas (P). (c) Coronal volume-rendered image shows soft tissue (black arrowheads) infiltrating the area around the hepatic artery (white arrowhead), portal vein (long arrow), and bile duct (short arrow), which contains a stent.