Slit ventricle syndrome and early-onset secondary craniosynostosis in an infant

th percentile for her age group after shunt surgery. Seven months later, she developed increased ICP symptoms and underwent a shunt revision with a diagnosis of shunt malfunction. Her symptoms were temporarily relieved, but she repeatedly visited the emergency room (ER) for the same symp- toms and finally collapsed, with an abrupt increase in ICP, 3 months later. Further evaluation revealed the emer - gence of sagittal synostosis at 7 months after initial shunt surgery. After reviewing all clinical data, slit ventri- cle syndrome combined with secondary craniosynostosis was diagnosed. Emergent cranial expansion surgery with shunt revision was performed, and the increased ICP signs subsided in the following days. Conclusions: Clinical suspicion and long-term HC monitoring are important in the diagnosis of slit ventricle syndrome and secondary craniosynostosis after shunt surgery, even in infants and young children.