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PurposeTo present the case of a 12-year-old female with an epibulbar osseous choristoma.ObservationsThe patient presented with right-sided conjunctival mass, which caused her discomfort. Slit lamp examination revealed a 5×5-mm, firm nodule in the superotemporal quadrant of the bulbar conjunctiva. The nodule had feeder vessels, adhered firmly to the sclera, and lacked signs of malignancy. The patient underwent excisional biopsy under general anesthesia. During this procedure, great care was taken to avoid perforation of the globe. The pathologic sections were significant for well-circumscribed osseous tissue without atypia.Conclusions and importanceWe describe diagnosis and successful surgical management of osseous choristoma the rarest subtype of ocular choristoma. With only 65 cases reported since mid-19th century, the condition remains poorly described. This report provides additional information on diagnosis and treatment of this rare condition.

Purpose: To present the case of a 12-year-old female with an epibulbar osseous choristoma. Observations: The patient presented with right-sided conjunctival mass, which caused her discomfort. Slit lamp examination revealed a 5×5-mm, firm nodule in the superotemporal quadrant of the bulbar conjunctiva. The nodule had feeder vessels, adhered firmly to the sclera, and lacked signs of malignancy. The patient underwent excisional biopsy under general anesthesia. During this procedure, great care was taken to avoid perforation of the globe. The pathologic sections were significant for well-circumscribed osseous tissue without atypia. Conclusions and importance: We describe diagnosis and successful surgical management of osseous choristoma the rarest subtype of ocular choristoma. With only 65 cases reported since mid-19th century, the condition remains poorly described. This report provides additional information on diagnosis and treatment of this rare condition.