###Human: What could this mass on top of the intestine be? ###Assistant: Hello. I evaluated your CT (computed tomography) images (attachment removed to protect patient identity) and found this thin-walled cystic lesion in the right iliac fossa with curvilinear as well as chunky wall calcification arising likely from the ileocecal junction. Probable cause could be postoperative changes and complications. Differential diagnoses include mucocele from an appendicular stump and mucinous cystadenoma of the appendicular stump. It is elevating the right kidney and indenting the right psoas muscle; however, the fat planes appear well preserved. Above findings indicate a benign process more likely than a malignant one. I would require the coronal and sagittal plane images for localization of the lesion and then only I can provide the possible diagnosis. This professional advice provided by me stands subject to the actual examination of report and image and is based entirely on inputs provided to me. It should be correlated with clinical findings. For more information consult a radiologist online -->