Lid/Orbit

Idiopathic Orbital Inflammatory Disease

Also known as: orbital pseudotumour, IOID, idiopathic orbital inflammation, orbital myositis, orbital pseudotumor, non-specific orbital inflammation, IOIS, painful proptosis adult

Clinical decision support only

OptoGuide™ supports professional judgement and does not diagnose or replace clinician responsibility.

Overview

A non-specific idiopathic inflammatory process affecting any structure within the orbit — the most common cause of painful proptosis in adults. Also known as orbital pseudotumour or idiopathic orbital inflammatory syndrome (IOIS). Can involve the lacrimal gland (dacryoadenitis), extraocular muscles (orbital myositis), the posterior orbit (posterior IOID), or diffuse orbital fat. Usually unilateral. Characteristically responds dramatically to systemic corticosteroids.

What OptoGuide™ covers for idiopathic orbital inflammatory disease

Recognition patterns — symptoms, signs, and differentiators
Don't-miss risks and escalation triggers
Management tiers with linked Australian therapeutics
Referral urgency, specialty, and letter drafting

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