title: [Bilateral choroid osteoma].
abstract: BACKGROUND
  Choroidal Osteoma is a rare, typically monolateral benign ossifying tumor of the choroid found in healthy females aged 10 to 30 years. In contrast, multiple idiopathic sclerochoroidal calcifications occur in elderly otherwise healthy subjects. Local or generalized distortions of calcium phosphate metabolism may cause secondary choroidal calcifications.
  
  
  METHODS
  We report on a 56-year-old woman, who underwent removal of a histologically verified osteoma 2 years ago. Ophthalmoscopically, there were multiple prominent choroidal tumors in the inferior midperiphery of both eyes. Ultrasonography showed high reflectivity and marked shadowing posterior to the lesion. CT-scan demonstrated the presence of calcifications. The patient neither belonged to the age group, in which choroidal osteomas are typically found, nor were the lesions located in the typical manner as reported in literature. The location in the inferior choroid has not yet been described for idiopathic sclerochoroidal calcifications. The presence of secondary choroidal calcifications was very unlikely, as there was no history of ocular inflammation or systemic disease such as hyperparathyreoidism or chronic renal failure.
  
  
  CONCLUSIONS
  Thus, despite the lack of histologic examination, one may assume the rare incidence of bilateral choroidal osteomas in atypical inferior localisation in our patient.
authors.affiliation: Augenklinik Universität Heidelberg.
authors.forename: K
authors.initials: K
authors.lastname: Rohrschneider
authors.forename: S
authors.initials: S
authors.lastname: Schatanek
authors.forename: F E
authors.initials: FE
authors.lastname: Kruse
authors.forename: H
authors.initials: H
authors.lastname: Sahl
authors.forename: H E
authors.initials: HE
authors.lastname: Völcker
mesh_terms: D002829:Choroid / Q000473:pathology / Q000601:surgery; D002830:Choroid Neoplasms / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D003937:Diagnosis, Differential; D005260:Female; D005451:Fluorescein Angiography; D005500:Follow-Up Studies; D006801:Humans; D008875:Middle Aged; D016609:Neoplasms, Second Primary / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D010016:Osteoma / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography; D014792:Visual Acuity / Q000502:physiology; D014794:Visual Fields / Q000502:physiology
vernacular_title: Bilaterale chorioidale Osteome.