Orbital pseudotumor

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Skull anatomy

Idiopathic orbital inflammatory syndrome (IOIS)

• Pain in eye - may be severe
• Restricted eye movement
• Decreased vision
• Double vision
• Eye swelling (proptosos)
• Red eye (rare)

Signs of pseudotumor can be seen when the eye is examined. Tests must be done to tell the difference between a pseudotumor and cancerous tumor and eye problems that can occur in people with thyroid disease.

Tests may include:

• CT scan of the head
• MRI of the head
• Ultrasound of the head
• Skull x-ray
• Biopsy of the tumor

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).

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