Plasmacytoma of the clivus presenting with an unusual combination of symptoms: case report.

A case of plasmacytoma of the clivus is presented. The patient was asymptomatic until a coincidental traumatic lesion produced manifestations of vagus nerve dysfunction. Conduction was blocked in some fibers of the vagus nerve while, at the same time, episodes of activity were triggered in fibers of the same nerve trunk, resulting in an unusual combination of symptoms. The symptomatology of the case is discussed.