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Orbital myositis: a study of six cases
G J Hankey1, P L Silbert, R H Edis
1Department of Neurology, Royal Perth Hospital, WA.
Australian and New Zealand Journal of Medicine
|December 1, 1987
Summary
Orbital myositis, an inflammation of eye muscles, is diagnosed using orbital CT scans. This condition often presents with painful eye movement and swelling, responding well to corticosteroid treatment.
Area of Science:
- Ophthalmology
- Radiology
Background:
- Orbital myositis is an inflammatory condition affecting extraocular muscles.
- It is considered a distinct entity within idiopathic orbital inflammatory syndromes, previously termed orbital pseudotumors.
Observation:
- Six cases of orbital myositis are presented, with a mean patient age of 33 years.
- Clinical presentation included painful ophthalmoplegia, proptosis, conjunctival congestion, and eyelid edema.
- Orbital CT scans revealed characteristic irregular extraocular muscle enlargement.
Findings:
- Orbital CT imaging confirmed the clinical suspicion of orbital myositis in all cases.
- Systemic corticosteroid therapy demonstrated rapid and significant positive responses in patients.
- Muscle biopsy in one case showed non-specific inflammation, ruling out vasculitis.
Implications:
- Orbital myositis is identifiable via non-invasive imaging like CT scans.
- Early diagnosis and treatment with corticosteroids are crucial for managing orbital myositis.
- Muscle biopsy is reserved for atypical or steroid-unresponsive cases to exclude malignancy.