Epibulbar osseous choristoma: a report of two cases.
Epibulbar osseous choristoma occurs rarely and is commonly mistaken for a dermoid or dermolipoma. We report two cases: an 8-year-old boy and a 79-year-old lady with epibulbar osseous choristomas where computed tomography showed an extraocular lesion in the temporal quadrant and diagnosis was confirmed by excision biopsy. The osseous component was adherent to the sclera in the young patient, while it was loosely attached to the surrounding tissue in the older patient. We believe that the 79-year-old lady is the oldest reported patient with an epibulbar osseous choristoma.