Horner syndrome

Definition of Horner syndrome

Horner syndrome is a rare condition that affects the nerves to the eye and face.

Causes, incidence, and risk factors

Horner syndrome can be caused by any interruption in a set of nerve fibers that start in the part of the brain called the hypothalamus and run to the face.

Signs and tests

An eye examination may show:

Treatment

Treatment depends on the cause of the problem. There is no treatment for Horner syndrome itself.

Expectations (prognosis)

The outcome depends on whether treatment of the cause is successful.

Review

David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine; and Daniel B. Hoch, PhD, MD, Assistant Professor of Neurology, Harvard Medical School, Department of Neurology, Massachusetts General Hospital. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc. – 6/15/2010

Central nervous system

ADAM Medical Encyclopedia

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