Contrast enhanced multi-detector CT and MR findings of a well-differentiated pancreatic vipoma

Figure 1 Contrast-enhanced multi-detector computed tomography: Transverse 3 mm thick images of arterial (A) and pancreatic phase (B) are shown. Computed tomography findings were prospectively considered negative as no definite hyper-vascular lesion could be appreciated. Retrospectively, a mildly, inhomogeneously enhancing lesion could be appreciated at the level of the pancreatic tail (arrow-head) with a small cyst on its anterior margin (arrow), both more conspicuous on the pancreatic phase (B) than in the arterial phase (A) measuring 79 vs 67 HU, respectively. In both images a faint cortico-medullary nephrogram is depicted due to the chronic renal insufficiency.