Acquired choroidal osteoma

Choroidal osteoma is a choristomatous lesion postulated to be congenital in nature. Described herein is the case of a 16-year- old female presenting with a peripapillary lesion diagnosed as choroidal osteoma on multimodal imaging. Routine fundus photography 18 months before presentation demonstrated a normal retina and choroid without evidence of the lesion. Overall, this report provides evidence that choroidal osteoma may be acquired and not always congenital in origin.