title: Orbital lymphoma mimicking optic nerve meningioma.
abstract: OBJECTIVE
  To describe two patients with orbital lymphoma mimicking optic nerve meningioma.
  
  
  METHODS
  Retrospective case review.
  
  
  RESULTS
  Both patients presented in their sixth decade with gradually increasing proptosis and decreasing vision. Computerized tomography revealed homogeneous masses encasing the optic nerves, which in conjunction with the clinical presentations were felt to represent optic nerve meningiomas. Biopsy, however, led to a diagnosis of lymphoma of mucosal-associated lymphoid tissue origin in one and a well-differentiated non-Hodgkin's lymphoma in the other.
  
  
  CONCLUSIONS
  Orbital lymphoma surrounding the optic nerve may mimic the clinical and radiological appearance of an optic nerve meningioma.
authors.affiliation: Department of Ophthalmology, Royal Adelaide Hospital, Adelaide, Australia.
authors.forename: Dinesh
authors.initials: D
authors.lastname: Selva
authors.forename: Jack
authors.initials: J
authors.lastname: Rootman
authors.forename: John
authors.initials: J
authors.lastname: Crompton
mesh_terms: D001706:Biopsy; D003131:Combined Modality Therapy; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D015451:Leukemia, Lymphocytic, Chronic, B-Cell / Q000175:diagnosis* / Q000628:therapy; D018442:Lymphoma, B-Cell, Marginal Zone / Q000175:diagnosis* / Q000628:therapy; D008279:Magnetic Resonance Imaging; D008297:Male; D008577:Meningeal Neoplasms / Q000175:diagnosis* / Q000628:therapy; D008579:Meningioma / Q000175:diagnosis* / Q000628:therapy; D008875:Middle Aged; D019574:Optic Nerve Neoplasms / Q000175:diagnosis* / Q000628:therapy; D009918:Orbital Neoplasms / Q000175:diagnosis* / Q000628:therapy; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed