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March 1964

Episcleral Osseous Choristoma—Report of Two Cases

Author Affiliations

From the Division of Ophthalmology, Sinai Hospital of Detroit and the Department of Ophthalmology, Wayne State University, College of Medicine.

Arch Ophthalmol. 1964;71(3):377-378. doi:10.1001/archopht.1964.00970010393014

In 1962, Boniuk and Zimmerman1 reviewed the literature, and reported six cases of what had formerly been called epibulbar osteoma. They found that a total of 20 cases had previously been reported. Since their publication, two additional cases have been reported by Wiesinger and Guerry.2 Boniuk and Zimmerman felt that "episcleral osseous choristoma" was a more appropriate term for this clinical entity. A choristoma is a proliferation of tissue elements at a site where they normally do not occur. An epibulbar dermoid would fall into the same category. Boniuk and Zimmerman pointed out the differences between the epibulbar dermoids and episcleral osseous choristomas: (1) episcleral osseous choristomas have all been found superotemporally, while the dermoids when epibulbar, are more often found inferotemporally; (2) epibulbar dermoids are associated with congenital anomalies in 30% of the reported cases, while episcleral osseous choristomas have not yet been reported with other congenital