Lymphangioma is a rare benign neoplasm and is often seen incidentally, as in the above case.

In the above case, the patient presented with vague abdominal pain and was found to have multiple findings, like abdominal aorta aneurysmal dilatation, atheromatous changes of the abdominal aorta, a left retroperitoneal cystic multi-loculated lesion with imperceptible wall, and changes in bladder outlet obstruction due to enlarged prostate.

So most probably, the lymphangioma in the retroperitoneum in the left para-aortic region in this case is an incidental finding.

Lymphangioma can become symptomatic if it is large enough and causes compression of adjacent structures.