title: Heterotopic ossification in the orbit.
abstract: BACKGROUND
  While calcification of orbital hemangiomas has been reported previously, no reports exist of heterotopic ossifications occurring within the orbit.
  
  
  METHODS
  A 30-year-old male presented with spontaneous onset of painless progressive proptosis of the left eye, with diplopia. The preoperative radiologic findings are presented. The lesion was excised completely. The pathologic features and probable causes are discussed.
  
  
  CONCLUSIONS
  Heterotopic ossification of the orbit should be considered in the differential diagnosis of an orbital lesion showing radiologic features of calcification or ossification.
authors.affiliation: Department of Neurosurgery, Christian Medical College and Hospital, Vellore--632004, Tamil Nadu, India.
authors.forename: A
authors.initials: A
authors.lastname: Shankar
authors.forename: Roy Thomas
authors.initials: RT
authors.lastname: Daniel
authors.forename: Noel
authors.initials: N
authors.lastname: Walter
authors.forename: Mathew Jacob
authors.initials: MJ
authors.lastname: Chandy
mesh_terms: D000328:Adult; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D009916:Orbital Diseases / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery*; D009999:Ossification, Heterotopic / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery*; D014057:Tomography, X-Ray Computed