Version October 2024
| CT appearance | Pathologic conditions | Associated findings |
| Round, well-defined mass(es) | Non-Hodgkin lymphoma | Retroperitoneal adenopathy |
| Metastic deposits | Small bowel nodules | |
| Mycobacterium avium complex infection | Hepatic and splenic lesions | |
| Whipple's disease | Thickened small bowel folds | |
| Mesenteric cysts | Fat attenuation | |
| Castelman disease | Hypervascular mass | |
| Ill-defined, irregular mass(es) | Small bowel carcinoid | Calcifications; small bowel mass |
| Mesenteric fibromatosis (desmoid) | Gardner's syndrome; abdominal wall infiltration | |
| Tumor infiltration (pancreas, gastric, colon) | Primary tumor | |
| Lymphoma | Retroperitoneal adenopathy | |
| Mesenteric panniculitis/sclerosing mesenteritis | Calcifications | |
| Stellate mesentery | Carcinomatosis | Ascites |
| Peritoneal lymphomatosis | Adenopathy | |
| Peritoneal mesothelioma | Ascites; pleuroperitoneal plaques | |
| Peritoneal tuberculosis | Ileocolonic thickening; ascites; peritoneal enhancement | |
| Systemic amyloidosis | Thrombosis; focal mesenteric thickening | |
| Vascular thrombosis |
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