Choroid plexus compression of glossopharyngeal nerve in patients with glossopharyngeal neuralgia.

Compression of the glossopharyngeal nerve by the lateral choroid plexus of the 4th ventricle protruding excessively through the foramen of Luschka may be at the basis of some forms of glossopharyngeal neuralgia. This condition was observed in four patients. In one case, an anterior compression of the 9th nerve by a megadolic vertebral artery was also present. The condition was resolved in all patients by separating the nerve from the plexus and transecting it at the level of the foramen of Luschka.