Abstract
Acquired Chiari 1 following ventriculoperitoneal shunting is an extremely unusual event. We report the case of an 8-year-old boy who presented with clinical and radiological signs of cerebellar tonsil herniation shortly after the placement of a cystoperitoneal shunt. Quantitative analysis of posterior fossa volumes (PFV) revealed that the patient had a smaller posterior fossa than age-matched normal controls. This abnormality, expressed as a decreased ratio between the posterior fossa and the supratentorial cavities (PFR), had already been present when the preoperative MRI was done. Our results suggest that pre-existing structural abnormalities in the posterior fossa may constitute an important factor in the development tonsillar herniation following supratentorial shunts.
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Received: 6 November 1997
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Lazareff, J., Kelly, J. & Saito, M. Herniation of cerebellar tonsils following supratentorial shunt placement. Child's Nerv Syst 14, 394–397 (1998). https://doi.org/10.1007/s003810050252
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DOI: https://doi.org/10.1007/s003810050252