title: Orbital giant conjunctival epithelial primary cyst.
abstract: METHODS
  A 15-year-old male, with no previous traumatic o surgical ocular injury, presented with a right eye proptosis and inferior displacement which began 4 months earlier. Ultrasound and CT showed a cystic lesion of 3.5 × 2 cm in the superior orbit. Surgical resection was performed by transconjunctival orbitotomy. The histopathology examination showed a cyst with nonkeratinized epithelium, and without goblet cells. After 10 years of follow-up, there have been no new lesions.
  
  
  CONCLUSIONS
  Conjunctival primary orbital cysts are very uncommon. They are usually of small-moderate size; giant cysts are exceptional. Diagnosis by imaging is essential to establish the differential diagnosis and surgical treatment.
authors.affiliation: Servicio de Oftalmología, Hospital 12 de Octubre, Universidad Complutense, Madrid, Spain.
authors.forename: F J
authors.initials: FJ
authors.lastname: Guijarro-Oria
authors.forename: E
authors.initials: E
authors.lastname: Mencía-Gutiérrez
authors.forename: E
authors.initials: E
authors.lastname: Gutiérrez-Díaz
authors.forename: E
authors.initials: E
authors.lastname: López-Tizón
mesh_terms: D000293:Adolescent; D003229:Conjunctival Diseases / Q000175:diagnosis / Q000601:surgery; D003560:Cysts / Q000175:diagnosis / Q000601:surgery; D006801:Humans; D008297:Male; D009915:Orbit