Medial Longitudinal Fasciculus Syndrome Associated with a Subdural Hygroma and an Arachnoid Cyst in the Middle Cranial Fossa

Abstract

A 60-year-old man complaining of diplopia and vertigo showed bilateral medial longitudinal fasciculus (MLF) syndrome. The CT scan revealed a space-occupying lesion with watery fluid in the left cranial fossa, which was divided into two parts by a thin septum. Surgical trepanation was performed followed by 4 weeks of prednisolone therapy. He was completely cured 5 months later. The plausible causes of MLF syndrome relevant to preexisting space-occupying lesions are discussed.
(Internal Medicine 31: 1286-1290, 1992)