Mesenteric cyst in coronal plane in different viewings. (a) Contrast-enhanced CT. Cystic mass in close relation with surrounding bowel structures. (b) Macroscopic appearance of the resected ascending colon and adjacent mesenteric cyst in the mesenteric fat. (c) Histological appearance of the resected colon (left) and cyst (right). Notice the mesothelial cell specific AE1/AE3 positive (brown colour) cells lining the colon wall, which lacks at the cystic site. This confirms the lack of mesothelial cells in the cyst wall. AE1/AE3 stain, ×10.