title: Orbital invasion by recurrent maxillary ameloblastoma.
abstract: OBJECTIVE
  To describe 2 patients with orbital invasion by maxillary ameloblastoma, a rare odontogenic tumor that is not commonly encountered in ophthalmic practice.
  
  
  METHODS
  Retrospective, interventional case report.
  
  
  METHODS
  Two patients who were diagnosed with maxillary ameloblastoma several years ago sought treatment for new-onset ocular and orbital signs and symptoms.
  
  
  METHODS
  Clinical and radiological findings and outcome.
  
  
  RESULTS
  In the first patient, tumor recurrence with orbital invasion was diagnosed, and the patient underwent a total orbital exenteration. No recurrence was noted after 18 months of follow-up. The second patient had intracranial involvement with orbital invasion and underwent an extensive resection through an intracranial approach. No recurrence was noted after a 6-month follow-up period.
  
  
  CONCLUSIONS
  Although a slow-growing tumor, maxillary ameloblastoma can recur after surgical excision and can be locally aggressive; it can invade the orbit and result in significant ocular morbidity. Ophthalmologists should be aware of this tumor and should monitor these patients closely when orbital invasion is suspected.
authors.affiliation: Division of Orbital and Ophthalmic Plastic Surgery, Jules Stein Eye Institute, and Department of Ophthalmology, David Geffen School of Medicine at UCLA, Los Angeles, California 90095-7006, USA. leiboiga15@yahoo.com.au
authors.forename: Igal
authors.initials: I
authors.lastname: Leibovitch
authors.forename: Robert M
authors.initials: RM
authors.lastname: Schwarcz
authors.forename: Sara
authors.initials: S
authors.lastname: Modjtahedi
authors.forename: Dinesh
authors.initials: D
authors.lastname: Selva
authors.forename: Robert A
authors.initials: RA
authors.lastname: Goldberg
mesh_terms: D000368:Aged; D000564:Ameloblastoma / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D006801:Humans; D008297:Male; D008441:Maxillary Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D008875:Middle Aged; D009361:Neoplasm Invasiveness; D009364:Neoplasm Recurrence, Local / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D009918:Orbital Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed