Optical coherence tomography of choroidal osteoma

PURPOSE: To examine the cross,sectional structure of a choroidal osteoma using optical coherence tomography. METHODS: Observational case report. A choroidal osteoma in the right eye of a 22-year-old woman was studied with fluorescein and indocyanine green fundus angiograms and optical coherence tomography. RESULTS: The optical coherence tomography showed that a creamy,white lesion in the tumor had an increased reflectivity with a cavernous structure, whereas an orange lesion showed less reflectivity beneath the apparently intact retinal pigment epithelium. The area of less-intense whiteness in the creamy white lesion showed higher reflectivity at the level of the retinal pigment epithelium, which precluded our viewing the deeper structure of the tumor. CONCLUSION: Optical coherence tomography can demonstrate the cavernous structure of a choroidal osteoma at a selective stage of a tumor's evolution, namely, when the retinal pigment epithelium is atrophied and the ossification is premature. (Am J Ophthalmol 2002; 133: 419-421. (C) 2002 by Elsevier Science Inc. All rights reserved).