New-onset hydrocephalus in an adult with cerebral palsy: A case report and review of the literature.

Hydrocephalus is a common comorbidity associated with brain injuries, including cerebral palsy (CP). In CP, hydrocephalus typically presents in infancy or early childhood. This report describes a patient in their mid 20 s with mixed dyskinetic-spastic CP with adult-onset hydrocephalus of unknown cause initially presenting with new-onset bilateral lower extremity spasms. Multiple interventions were trialed, including ischial bursal steroid injections, botulinum toxin injections, trigger point injections, multiple oral medications, and physical and massage therapies without benefit. Given lack of treatment response, imaging of the neuraxis was obtained. Magnetic resonance imaging (MRI) of the brain demonstrated new diffuse moderate ventriculomegaly compared to prior MRI. Ophthalmologic evaluation demonstrated papilledema, and opening pressure on lumbar puncture was elevated to 44 mmHg HO. The patient underwent ventriculoperitoneal shunt placement with rapid and near-resolution of their spasms and pain. This patient represents a unique case of new-onset hydrocephalus in an adult with CP. To ensure appropriate and timely diagnosis and treatment, individuals with neurologic conditions such as CP should have ongoing surveillance and comprehensive evaluation for any neurologic or functional changes, including changes in baseline tone. Future research is needed to better understand if adults with CP are at higher risk for the development of hydrocephalus in adulthood.