Peritoneal cysts: a complication of ventriculoperitoneal shunts.

Large abdominal cysts are not a common complication of peritoneal shunts. In our experience only 11 of 1,585 peritoneal shunts developed this complication (0.7 percent). We believe that infection, particularly by S. epidermidis and multiple-shunt revisions, is related to the development of the cysts. Simple parencentesis and replacement of the shunt usually are sufficient treatment for this complication if infection is not present.