Bilateral Choroidal Osteoma Associated with Optic Neuritis in Behçet's Disease.

Three-dimensional optical coherence tomography (OCT) were founded to be useful to evaluate posterior pole involvement in an unusual concurrence of bilateral choroidal osteoma after optic disk inflammation in a 36-year-old woman in whom optic neuritis was the first symptom of Behçet's disease. Bilateral asymmetric choroidal osteoma was observed after optic disk inflammation following disease recurrence. B-scan ultrasonography and orbital axial CT were essential for the diagnosis. Bilateral full-thickness calcified plaques in juxtapapillary choroids were the main intraocular feature after optic neuritis. The pathogenesis of bone formation in choroidal osteoma remains uncertain and although several etiological factors have been associated with its onset, intraocular inflammation is a very unusual cause.