Selected images of a contrast enhanced abdomen CT scan in the portal venous phase.
Large (>5 cm) non-enhancing, elongated, fat attenuation mass lesion with hyperdense peripheral halo, located in the right upper quadrant, deep to the rectus abdominis muscle and adjacent to, but separate from, the ascending colon.
No bowel wall thickening or lymphadenopathy.
The appendix is normal - no signs of appendicitis .
The size and right-sided location make it much more likely to be a mesenteric infarction rather than epiploic appendagitis, although both are possible.