RT Journal Article SR Electronic T1 Occipital Intradiploic CSF Pseudocyst: An Unusual Complication of a Ventriculoperitoneal Shunt Malfunction JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 635 OP 636 DO 10.3174/ajnr.A1320 VO 30 IS 3 A1 T.S. Sato A1 T. Moritani A1 P. Hitchon YR 2009 UL http://www.ajnr.org/content/30/3/635.abstract AB SUMMARY: We report a rare and unique complication of ventriculoperitoneal (VP) shunt malfunction. A progressively expansile, CSF-containing occipital intradiploic cyst developed in a 15-year-old boy at the site of cystoperitoneal shunt draining a Dandy-Walker cyst; the shunt was placed when the boy was 4 years old. A proposed pathogenesis of the lesion is discussed.