Sclerosing orbital inflammation and systemic disease.

Area of Science:

• Ophthalmology
• Rheumatology
• Systemic Inflammatory Diseases

Background:

• Sclerosing orbital inflammation (SOI) can occur in isolation or as part of systemic inflammatory conditions.
• Differentiating these presentations is crucial for accurate diagnosis and management.
• This study compares clinical features of isolated orbital SOI versus SOI associated with systemic disease.

Observation:

• A case series identified 13 patients with SOI, noting associations with multifocal fibrosclerosis (MFF) and other systemic diseases.
• Literature review identified 68 additional SOI case reports.
• Bilateral orbital involvement was significantly more common in patients with systemic disease (69%) compared to those without (3.6%).

Findings:

• Systemic involvement in SOI, particularly MFF, strongly correlates with bilateral presentation.
• Elevated erythrocyte sedimentation rate (ESR) was a key indicator, averaging 41 mm/hour in patients with systemic disease versus 7 mm/hour in those without.
• In MFF cases, ESR was markedly elevated (mean 83 mm/hour), with 95% above normal levels.

Implications:

• SOI associated with systemic inflammatory diseases, including MFF, often presents bilaterally.
• Elevated ESR is a significant clinical marker for systemic involvement in SOI.
• Recognizing these distinctions aids in timely diagnosis and appropriate treatment strategies for patients with orbital inflammation.