Involvement of orbital tissues by sarcoid

Area of Science:

• Ophthalmology
• Pathology
• Immunology

Background:

• Sarcoidosis is a multisystem inflammatory disease.
• Orbital involvement in sarcoidosis is uncommon but can affect vision.
• Distinguishing systemic from isolated orbital sarcoidosis is clinically important.

Purpose of the Study:

• To investigate the prevalence of systemic sarcoidosis in patients with orbital sarcoid lesions.
• To determine if isolated orbital sarcoidosis occurs and if it has unique histological features.

Main Methods:

• Retrospective review of 15 orbital biopsy specimens diagnosed with sarcoid.
• Analysis of pre-biopsy and post-biopsy systemic sarcoidosis status.
• Histological examination of orbital sarcoid tissue.

Main Results:

• Of 15 orbital sarcoid biopsies, 3 patients had known systemic sarcoidosis.
• 11 of 12 patients without prior systemic sarcoidosis diagnosis were found to have systemic disease post-biopsy.
• One patient showed no evidence of systemic sarcoidosis during a 7-year follow-up, suggesting isolated orbital sarcoidosis.

Conclusions:

• The majority of orbital sarcoidosis cases are associated with systemic sarcoidosis.
• Isolated orbital sarcoidosis is rare but possible.
• Histological findings in orbital sarcoid lesions do not differentiate between systemic and isolated disease.