Cruciate bibrachial diplegia due to an acutely trapped fourth ventricle.

A 20-year-old female presented to us with bibrachial diplegia and dysarthria. She had an earlier history of craniosynostosis, multiple cranial surgeries and recent meningitis followed by ventriculoperitoneal shunting. Her symptoms started with a cruciate paralysis followed by rapid descending quadriparesis. Imaging revealed a trapped fourth ventricle as the cause of her descending paralysis.