title: Different locations of dermoid cysts in the orbital region.
abstract: BACKGROUND
  Dermoid cysts are frequent unilateral congenital benign tumors that can be found at different locations throughout the body. In the orbital region, dermoid cysts occur predominantly in the supero-temporal quadrant. However, different orbital locations are possible, making this entity an important differential diagnosis for orbital tumors.
  
  
  METHODS
  We retrospectively reviewed the charts of 23 consecutive patients operated in our institution between 2005 and 2014 for orbital tumors that were diagnosed as congenital dermoid or epidermoid cysts.
  
  
  RESULTS
  There were 21 dermoid and 2 epidermoid cysts. The median age at surgery time was 7 years (range 1-41). There were 15 females and 8 males. Eleven cysts were located supero-temporally (47.8%), seven supero-medially (30.4%), two temporally (8.7%), one at the frontal bone (4.4%) and two in the fossa of the lacrimal gland (8.7%). The mean cyst diameter was 13.1 mm±5.0 (SD). None had signs of malignant disease. No recurrence was observed after complete excision.
  
  
  CONCLUSIONS
  Dermoid cysts of orbital region are mostly located in the supero-temporal quadrant. However, other orbital locations are possible and dermoid cysts must thus be considered in the differential diagnosis of any mass in the orbital region.
authors.affiliation: Department of Oculoplastic Surgery, Jules Gonin Eye Hospital, Lausanne, Switzerland.
authors.forename: Y
authors.initials: Y
authors.lastname: Sadeghi
authors.affiliation: Department of Oculoplastic Surgery, Jules Gonin Eye Hospital, Lausanne, Switzerland.
authors.forename: A
authors.initials: A
authors.lastname: Obéric
authors.affiliation: Department of Oculoplastic Surgery, Jules Gonin Eye Hospital, Lausanne, Switzerland.
authors.forename: M
authors.initials: M
authors.lastname: Hamédani
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D003884:Dermoid Cyst / Q000473:pathology*; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D009918:Orbital Neoplasms / Q000473:pathology*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D055815:Young Adult