Radiopaedia.org

Evidence of lumbar peritoneal shunt, with the tip in the subcutaneous tissue of the left anterior abdominal wall. It's not entering the abdominal cavity.
Secondary subcutaneous collection measuring about 4 x 8 x 13 cm is noted and shows extension into the abdominal wall muscles but not beyond it.
Features are consistent with an abdominal wall pseudocyst complicating a malpositioned lumboperitoneal shunt.

There are a few mesenteric lymph nodes with some surrounding fat stranding along the course of superior mesenteric vessels, suggesting mesenteric panniculitis.