title: [A case of choroidal osteoma detected by high-penetration optical coherence tomography].
abstract: BACKGROUND
  Choroidal osteoma is a rare intraocular tumor, composed of mature bone tissue. We performed high-penetration optical coherence tomography (HP-OCT) on a patient with choroidal osteoma with serous retinal detachment(SRD).
  
  
  METHODS
  A 49-year-old woman complained of visual loss OD. Best corrected visual acuity OD was 0.4. The right eye showed a yellowish white subfoveal lesion of 3 disc diameters in size. As computed tomography of the tumor showed choroidal calcification, the diagnosis of choroidal osteoma was made. HP-OCT demonstrated the structure of the tumor clearly, but normal choroidal vessels were not depicted. In addition, HP-OCT showed strong signals in the lamina choroidocapillaris, and no choroidal vessels were found in the parafoveal area of the left eye.
  
  
  CONCLUSIONS
  A case of choroidal osteoma is presented. HP-OCT can detect structural changes in the choroidal lesions at an early stage of the disease.
authors.affiliation: Department of Ophthalmology. Institute of Clinical Medicine. University of Tsukuba, Japan. tam_y110@yahoo.co.jp
authors.forename: Yumi
authors.initials: Y
authors.lastname: Hasegawa
authors.forename: Fumiki
authors.initials: F
authors.lastname: Okamoto
authors.forename: Takahiro
authors.initials: T
authors.lastname: Hiraoka
authors.forename: Yoshiaki
authors.initials: Y
authors.lastname: Yasuno
authors.forename: Shuichi
authors.initials: S
authors.lastname: Makita
authors.forename: Tetsuro
authors.initials: T
authors.lastname: Oshika
mesh_terms: D002830:Choroid Neoplasms / Q000175:diagnosis* / Q000473:pathology; D005260:Female; D006801:Humans; D008875:Middle Aged; D010016:Osteoma / Q000175:diagnosis* / Q000473:pathology; D041623:Tomography, Optical Coherence