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Epibulbar osseous choristoma.

Tolga Bicer1, Hasan Soylemez2

  • 1Ophthalmology Department, Diskapi Yildirim Beyazit Education and Research Hospital, Irfan Bastug Street, Diskapi, 06330 Ankara, Turkey.

Case Reports in Ophthalmological Medicine
|January 13, 2015
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Summary

This case report details a rare subconjunctival osseous choristoma, an unusual bone growth in the eye. Surgical excision was performed for cosmetic reasons, revealing mature bone tissue.

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Area of Science:

  • Ophthalmology
  • Pathology

Background:

  • Osseous choristomas are rare benign tumors composed of mature bone.
  • They typically present in the superior temporal episclera but can occur elsewhere in the ocular adnexa.
  • Subconjunctival osseous choristomas are exceptionally rare presentations.

Purpose of the Study:

  • To report a case of a rare subconjunctival osseous choristoma in the lateral canthus.
  • To describe the clinical presentation, diagnostic findings, and surgical management of this rare condition.
  • To contribute to the literature on the histopathological characteristics of osseous choristomas.

Main Methods:

  • A 20-year-old male presented with an asymptomatic subconjunctival lesion.
  • Ophthalmic examination and orbital computerized tomography were performed.
  • Surgical excision was undertaken due to cosmetic concerns.

Main Results:

  • Orbital CT confirmed an osseous lesion.
  • Surgical excision revealed the lesion adhered to the conjunctiva but not the sclera or extraocular muscles.
  • Histopathological examination showed mature heterotopic osseous tissue with Haversian canals.

Conclusions:

  • Subconjunctival osseous choristomas, though rare, can occur in the lateral canthus.
  • Surgical excision is a viable option for cosmetic improvement.
  • Histopathology confirms the nature of the lesion as mature bone tissue.