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.

Idiopathic orbital inflammatory syndrome (IOIS)

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

Images

Skull anatomy

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Orbital pseudotumor Symptoms

Review Date: 07/28/2010
Reviewed By: 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.

A.D.A.M., Inc. is accredited by URAC, also known as the American Accreditation HealthCare Commission (www.urac.org)