Figure 1.

Case 1. A, T1-weighted axial Vibe MR image after gadolinium administration. Hypoenhancing mass on arterial phase imaging in the pancreatic neck with subsequent resection demonstrating pancreatic adenocarcinoma (arrow). B, Axial contrast-enhanced CT demonstrating a well-defined, enhancing mass in the small bowel mesentery (arrow). C, F-18 FDG PET demonstrates a left mesenteric root mass with moderately increased FDG activity (SUV maximum, 3.8) suspicious for recurrent disease. Subsequent biopsy diagnosed desmoid fibromatosis. CT = computed tomography; FDG = fluorodeoxyglucose; MR = magnetic resonance; PET = positron emission tomography; SUV = standardized uptake value.