title: Swept-source optical coherence tomographic findings of choroidal osteoma.
abstract: OBJECTIVE
  To report the morphologic features of a choroidal osteoma using swept-source optical coherence tomography (SS-OCT) and fundus autofluorescence (FAF).
  
  
  METHODS
  Two eyes of two cases with a choroidal osteoma were studied using SS-OCT and FAF.
  
  
  RESULTS
  The location of the tumor was circumpapillary without macular involvement in case 1 and juxtapapillary with macular involvement in case 2. Both cases had a mixture of calcified and decalcified areas, and a concomitant choroidal neovascularization was found in case 2. The FAF images showed decreased autofluorescence in the central decalcified regions and relatively preserved fluorescence in marginal calcified regions in both cases. SS-OCT revealed a normal inner retina and an abnormal outer retina in both cases, and subretinal fluid in case 2. The calcified regions appeared sponge-like and were multilayered in case 2. A lamellar reflective pattern was observed in the decalcified regions in case 1, and hyperreflective mound-like areas were observed in both cases. SS-OCT demonstrated hyperreflective areas above Bruch's membrane accompanied by disruption of Bruch's membrane in case 1. The chorioscleral border was visible in both cases.
  
  
  CONCLUSIONS
  The FAF pattern in the calcified and decalcified areas of the choroidal osteoma may correspond to the different stage of tumor evolution. The SS-OCT findings indicate that choroidal osteomas can have characteristic reflective patterns and alterations of the overlying retina.
authors.affiliation: Department of Ophthalmology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Himeji, Japan.
authors.forename: Yuki
authors.initials: Y
authors.lastname: Hayashi
authors.affiliation: Department of Ophthalmology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Himeji, Japan.
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Mitamura
authors.affiliation: Department of Ophthalmology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Himeji, Japan.
authors.forename: Mariko
authors.initials: M
authors.lastname: Egawa
authors.affiliation: Department of Ophthalmology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Himeji, Japan.
authors.forename: Kentaro
authors.initials: K
authors.lastname: Semba
authors.affiliation: Department of Ophthalmology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Himeji, Japan ; Department of Ophthalmology, Saneikai Tsukazaki Hospital, Himeji, Japan.
authors.forename: Toshihiko
authors.initials: T
authors.lastname: Nagasawa
keywords: Choroidal osteoma; Fundus autofluorescence; Swept-source optical coherence tomography