Orbital pseudotumor

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Skull anatomy

The orbit is a bony, pyramid-shaped cavity in the skull. It contains and protects the eyeball and related structures. Orbital pseudotumor is a swelling of the orbital tissues behind the eye, but unlike cancerous tumors, it cannot invade other tissues or spread elsewhere.

Idiopathic orbital inflammatory syndrome (IOIS)

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

Review Date: 09/01/2006
Reviewed By: Manju Subramanian, MD, Assistant Professor in Ophthalmology, Vitreoretinal Disease and Surgery, Boston University Eye Associates, Boston, MA. Review provided by VeriMed Healthcare Network.