Case Report: CSF hypotension secondary to a free syringo subarachnoid peritoneal shunt

Abstract Syringomyelia is present in 40% of pediatric patients with Chiari malformation. Typically treated with posterior fossa decompression, some cases require further intervention such as syrinx shunting. We report a 16-year-old female with Chiari type 1 malformation and syringomyelia who underwent posterior fossa decompression and subsequent free syringo-subarachnoid-peritoneal shunting. The patient developed symptoms of CSF overdrainage, and imaging indicated CSF hypotension. Distal catheter ligation temporarily improved symptoms, but eventually, a programmable ventricular shunt was necessary due to shunt dependence. This case highlights the rare complication of CSF overdrainage from syrinx shunting and the importance of shunt selection considerations.