Horner's syndrome (patient information)

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Horner's syndrome

Overview

What are the symptoms?

What are the causes?

Diagnosis

When to seek urgent medical care?

Treatment options

Where to find medical care for Horner's syndrome?

What to expect (Outlook/Prognosis)?

Possible complications

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-In-Chief: Varun Kumar, M.B.B.S.

Overview

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

What are the symptoms of Horner's syndrome?

  • Decreased sweating on the affected side of the face
  • Drooping eyelid (ptosis)
  • Sinking of the eyeball into the face
  • Small (constricted) pupil (the black part in the center of the eye)

There may also be symptoms of the disorder that is causing the problem.

What causes Horner's syndrome?

Horner's 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.

Sympathetic nerve fiber injuries can result from:

  • Injury to one of the main arteries to the brain (carotid artery)
  • Injury to nerves in the neck called the brachial plexus
  • Migraine or cluster headaches
  • Stroke, tumor, or other damage to a part of the brain called the brainstem
  • Tumor in the top of the lung

Rarely, Horner's syndrome may be present at birth (congenital). The condition may occur with a lack of color (pigmentation) of the iris (colored part of the eye).

Diagnosis

An eye examination may show:

  • Changes in how the pupil opens or closes
  • Eyelid drooping

A complete medical and nervous system (neurological) examination can show whether any other parts of the body are affected.

Other tests may include:

  • Blood tests
  • Blood vessel tests (cerebral angiogram, CT angiogram, or MR angiogram)
  • Chest x-ray or chest CT scan
  • MRI or CT scan of the brain
  • Spinal tap (lumbar puncture)

You may need to be referred to a doctor who specializes in vision problems related to the nervous system (neuro-ophthalmologist).

When to seek urgent medical care?

Call your health care provider if you have symptoms of Horner's syndrome.

Treatment options

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

Where to find medical care for Horner's syndrome?

Directions to Hospitals Treating Horner's syndrome

What to expect (Outlook/Prognosis)?

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

Possible complications

There are no direct complications of Horner syndrome itself. However, there may be complications from the disease that caused Horner's syndrome or from its treatment.

Sources

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