Transient small bowel angioedema due to intravenous iodinated contrast media

Figure 1 A 55-year-old man. A: Circumferential thickening of the proximal small bowel in a long segment including the descending duodenum (long arrow) and horizontal duodenum (double short arrows) in venous phase image; B and C: This bowel segment appears normal in unenhanced image (B) and arterial phase image (C).

Figure 2 A 46-year-old man. A: The proximal bowel segment is slightly thickened in arterial phase image; B: The proximal bowel segment shows marked circumferential thickening in venous phase.

Figure 3 A 32-year-old woman. A: Venous phase image reveals an edematous proximal small bowel segment, including the descending and horizontal duodenum; B: The edematous wall resolved after the 40-s delayed image; C: This same bowel segment presented as normal on the unenhanced image.