School ager with a ventriculoperitoneal shunt with vomiting, diplopia, abdominal pain and newly dilated lateral ventricles

CT of CSFoma / cerebrospinal fluid pseudocyst
Axial CT with contrast of the abdomen (above) shows the VP shunt anteriorly in the abdomen coursing through a multiloculated fluid collection on the left side of the abdomen. Coronal CT (below left) shows multiple dilated loops of proximal small bowel while the sagittal CT (below right) shows the fluid collection to have at least 3 locules.

The diagnosis was a ventriculoperitoneal shunt malfunction in the form of a CSFoma.