title: [Primary orbital mucocele: exophthalmos and optic atrophy].
abstract: OBJECTIVE
  Primary intraorbital mucoceles arising from the optic canal are extremely rare. We describe a patient with compressive optic neuropathy caused by an intraorbital mucocele.
  
  
  METHODS
  A 51-year-old woman presented with proptosis and reduced vision. Magnetic resonance imaging showed a mass compressing the optic nerve. There was no direct connection between any paranasal sinus and the mass cavity, as assessed in imaging studies and intraoperatively confirmed. The pathological diagnosis after the operation indicated a mucocele.
  
  
  CONCLUSIONS
  Considering the absence of air pockets in the orbit, the mucocele might have originated from ectopic mucinous tissue that appeared during the development of the optic canal.
authors.affiliation: Servicio de Oftalmología, Hospital Clínico Universitario Lozano Blesa, Zaragoza, Spain. Nelson5000@latinmail.com
authors.forename: N A
authors.initials: NA
authors.lastname: Rodríguez-Marco
authors.forename: A M
authors.initials: AM
authors.lastname: Domínguez-Polo
authors.forename: J A
authors.initials: JA
authors.lastname: Cristóbal-Bescós
authors.forename: M C
authors.initials: MC
authors.lastname: Ispa-Callén
authors.forename: J
authors.initials: J
authors.lastname: Castillo-Laguarta
mesh_terms: D003937:Diagnosis, Differential; D005094:Exophthalmos / Q000209:etiology*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008279:Magnetic Resonance Imaging; D008875:Middle Aged; D009078:Mucocele / Q000150:complications / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000601:surgery; D009896:Optic Atrophy / Q000209:etiology*; D009916:Orbital Diseases / Q000000981:diagnostic imaging / Q000601:surgery; D013997:Time Factors; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome; D014792:Visual Acuity