CT scan. Neutropenic enterocolitis. (A) Coronal contrast-enhanced CT image through the abdomen and pelvis. Coronal contrast-enhanced CT demonstrates bowel wall thickening with low attenuation in the submucosal layer of the bowel wall representing bowel wall edema. (B) Axial contrast-enhanced CT through the abdomen. Axial contrast-enhanced CT through the abdomen demonstrates bowel wall thickening with a “target sign” in the ascending colon. The mucosa and muscularis layers are hyperenhancing, whereas the submucosal low density represents bowel wall edema.