Orbit and ocular adnexae
Idiopathic orbital inflammation
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Aka pseudotumour
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Non-granulomatous inflammation within the orbit with no identifiable local or systemic cause
- Any tissue may be infiltrated including muscles, lacrimal gland etc
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Unilateral or bilateral
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Inflammatory infiltrate of lymphocytes and plasma cells
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Lymphoid follicles may be present
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Usually responds to steroids unless fibrosis has occurred
Management
- Exclude infection!
- Oral prednisolone eg. 80mg per day: typically a prompt clinical response
- Taper over 6-8 weeks