Orbital Actinomyces Masquerading as Meningioma.

Area of Science:

• Ophthalmology
• Infectious Diseases
• Radiology

Background:

• Orbital actinomycosis is an uncommon infection with a typically slow progression.
• It presents diagnostic challenges due to nonspecific clinical and imaging findings.
• It can be mistaken for neoplastic or inflammatory conditions.

Observation:

• A case of orbital actinomycosis is presented.
• The condition mimicked a meningioma on initial evaluation.
• Imaging revealed hyperostosis and an interosseous tract.

Findings:

• Actinomycosis can present as a rare orbital mass.
• Imaging findings may suggest other orbital pathologies like meningioma.
• Hyperostosis and interosseous tracts can be associated imaging findings.

Implications:

• Early recognition of orbital actinomycosis is crucial for appropriate treatment.
• Considering infectious etiologies in orbital masses is important.
• This case underscores the need for a broad differential diagnosis in orbital imaging.