We present the case of a 3-year-old male child with an epibulbar bone choristoma. The patient presented with a hard consistency subconjunctival mass of 8×10mm in the superior-temporal quadrant of his right eye along with vascularisation and a long cilium of approximately 8 to 10mm that touched the corneal surface. The histopathology study showed the presence of trabeculae of mature, compact bone surrounded by fibrous tissue, as well as Havers channels with concentric rings of laminar bone without bone marrow, and with normal osteocytes which defined the diagnosis of epibulbar bone choristoma. Osseous choristoma is the rarest type of the ocular choristoma and should be considered as a differential diagnosis among paediatric epibulbar tumours.
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Article Synopsis
- An ocular osseous choristoma is a rare growth of mature bone found in the eye or surrounding tissue, representing just 1.7% of all epibulbar choristomas.
- The case study discusses a 20-month-old girl with a painless, firm mass at the left lateral canthus, which had been present since birth, and was diagnosed as an osseous choristoma after biopsy.
- The findings suggest that osseous choristomas should be included in the diagnosis of eyelid lesions present from birth and highlight the need for further research on their potential links to eye structures.
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