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Orbital pseudotumor - Overview

Alternative Names

Idiopathic orbital inflammatory syndrome (IOIS)

Definition of Orbital pseudotumor:

Orbital pseudotumor is a swelling of the tissues behind the eye in an area called the orbit. The orbit is the bony cavity in the skull where the eye sits. It protects the eyeball and the muscles and tissue that surround it.

Unlike cancerous tumors, an orbital pseudotumor does not spread to other tissues or places in the body.

Causes, incidence, and risk factors:

The cause is unknown. It most commonly affects young women, although it can still occur at any age.

Skull anatomy

Reviewed last on: 7/28/2010
Linda J. Vorvick, MD, Medical Director, MEDEX Northwest Division of Physician Assistant Studies, University of Washington, School of Medicine; Franklin W. Lusby, MD, Ophthalmologist, Lusby Vision Institute, La Jolla, California. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

References

Fay A. Diseases of the visual system. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 449.

Mendenhall WM, Lessner AM. Orbital pseudotumor. Am J Clin Oncol. 2010 Jun;33(3):304-6.

Karesh JW, On AV, Hirschbein MJ. Noninfectious orbital inflammatory disease. In: Tasman W, Jaeger EA, eds. Duane’s Ophthalmology. 15th ed. Philadelphia, Pa: Lippincott Williams & Wilkins; 2009:chap 35.

Glaser JS, Tse DT, Chang WJ. Orbital disease and neuro-ophthalmology. In: Tasman W, Jaeger EA, eds. Duane’s Ophthalmology. 15th ed. Philadelphia, Pa: Lippincott Williams & Wilkins; 2009:chap 14.

Swelling

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