title: Epibulbar osseous choristoma in 8 patients.
abstract: OBJECTIVE
  To describe the clinical features and histopathology of epibulbar osseous choristoma in a series of patients.
  
  
  METHODS
  Noncomparative case series with chart review of 8 patients.
  
  
  RESULTS
  At presentation, the mean age of the patients was 19 years (median, 19 years; range, 0.8-38 years), with 6 women and 2 men (6 Caucasian, 1 Hispanic, and 1 African American). There were no related systemic syndromes, and visual acuity was unaffected in all cases. The choristoma was superotemporal (n = 8, 100%), with epicenter located in the fornix (n = 8, 100%), deep to Tenon fascia (n = 8, 100%), and of yellow (n = 2, 25%), white (n = 2, 25%), or pink (n = 4, 50%) color. The mean basal dimension was 9 mm (median, 10 mm; range, 3.5-14 mm), and mean thickness was 4 mm (median, 4 mm; range, 2-5 mm). Four cases were managed with observation and 4 with surgical excision, revealing tumor base adherent to the episclera (n = 2, 50%) or loose within Tenon fascia (n = 2, 50%). There were no cases to demonstrate intrascleral involvement, growth, or recurrence.
  
  
  CONCLUSIONS
  Epibulbar osseous choristoma is a congenital lesion of mature bone located superotemporally in the fornix at the level of Tenon fascia or episclera in young patients.
authors.affiliation: Ocular Oncology Service, Wills Eye Institute, Thomas Jefferson University, Philadelphia, PA, USA. carol.shields@shieldsoncology.com
authors.forename: Carol L
authors.initials: CL
authors.lastname: Shields
authors.forename: Anam
authors.initials: A
authors.lastname: Qureshi
authors.forename: Ralph C
authors.initials: RC
authors.lastname: Eagle
authors.forename: Sara E
authors.initials: SE
authors.lastname: Lally
authors.forename: Jerry A
authors.initials: JA
authors.lastname: Shields
mesh_terms: D000293:Adolescent; D000328:Adult; D001842:Bone and Bones; D002648:Child; D002828:Choristoma / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D005260:Female; D006801:Humans; D007223:Infant; D008279:Magnetic Resonance Imaging; D008297:Male; D033401:Microscopy, Acoustic; D013508:Ophthalmologic Surgical Procedures; 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; D014792:Visual Acuity / Q000502:physiology; D055815:Young Adult