Cerebrospinal fluid pseudocyst after urinary diversion.

The development of an abdominal mass after urinary diversion in a patient with a ventriculoperitoneal shunt should alert the physician to the possibility of a cerebrospinal fluid pseudocyst. Two pediatric cases of cerebrospinal fluid pseudocysts are presented to illustrate this complication. The etiology, diagnosis and management of the pseudocyst are discussed and the literature is reviewed.