Horner's syndrome, an unusual manifestation of multiple sclerosis.

From the Department of Neurology, Arizona Health Sciences Center, University of Arizona. It seems remarkable that multiple sclerosis does not commonly cause a Horner's syndrome for this syndrome is a manifestation of many different disease processes which affect the caudal brainstem and cervical spinal cord, as does multiple sclerosis. Yet, a careful review of the literature detailing the clinical presentation of multiple sclerosis failed to reveal any mention of this syndrome.