Epibulbar Complex Choristoma Containing Bone: A Case Report and Closer Look at Classifications

Author:

Angus Zachary George,McKelvie Penelope,Hardy Thomas G.ORCID

Abstract

Introduction: Epibulbar choristoma is a benign congenital lesion containing histologically normal-appearing tissue in an abnormal ectopic location. An epibulbar choristoma is classified as either epibulbar dermoid, dermolipoma, or complex choristoma based on histological examination. The case presented was a presumed epibulbar dermolipoma with no signs of ossification on imaging, examination, or intraoperatively until the specimen was examined histologically, clarifying the lesion as an epibulbar complex choristoma. Reassuringly, the presence of bone in such lesions should not change management. Case Presentation: A mother noticed a small fleshy mass on her 9-year-old daughter’s superotemporal bulbar conjunctiva. The suspected epibulbar dermolipoma was confirmed with MRI and initially managed conservatively. Two years later, she was referred for apparent growth and cosmetic concerns, and she underwent surgical debulking. Conclusion: We present this case for its unusual presentation and histological findings. Orbital surgeons should be aware of the possibility of ossification of epibulbar choristomas and avoid confusion with alternative diagnoses. Clarification of the latest classification system for epibulbar choristomas is provided.

Publisher

S. Karger AG

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