Bilateral choroidal osteoma in three siblings.

Area of Science:

• Ophthalmology
• Genetics
• Oncology

Background:

• Choroidal osteomas are rare, benign bone tumors originating in the choroid layer of the eye.
• While often unilateral, familial cases and bilateral presentations are documented, suggesting potential genetic predispositions.
• Understanding the etiology and natural history of choroidal osteomas is crucial for diagnosis and management.

Observation:

• Three siblings, including a sister and identical twin brothers, presented with bilateral choroidal osteomas.
• The sister's tumor showed significant growth over two years, while the brothers' tumors remained stable with one developing a new lesion.
• The mother exhibited similar, but non-calcified, retinal findings, hinting at a possible inherited component.

Findings:

• The occurrence of bilateral choroidal osteomas in multiple siblings strongly suggests a genetic basis or a shared environmental factor.
• The observed growth patterns and new lesion development highlight the variable clinical course of choroidal osteomas.
• The mother's retinal findings, though not osteomas, may represent a related ocular manifestation or precursor.

Implications:

• The familial presentation supports the hypothesis that choroidal osteomas may arise from choristomatous malformations.
• Genetic counseling and further research into the hereditary factors of choroidal osteomas are warranted.
• Long-term monitoring of affected individuals and their families is essential to track tumor progression and potential associated conditions.