Orbital pseudotumor
Definition
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.
Alternative Names
Idiopathic orbital inflammatory syndrome (IOIS)Causes
The cause is unknown. It most commonly affects young women, although it can still occur at any age.
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