title: Simultaneous, bilateral anterior ischemic optic neuropathy (AION) in polycythemia vera: a case report.
abstract: BACKGROUND
  Polycythemia vera (PV) is a hemopoetic disorder. Apparently, although thrombosis accounts for the majority of morbidity, AION has not been associated with PV so far. PATIENT AND FINDINGS: A 63 y-old woman with PV was hospitalized because of acute liver failure. She also experienced bilateral painless loss of vision. Bilateral, pale optic disc swelling with flame-like hemorrhages, more pronounced in the right eye, constricted visual fields, and relative afferent papillary defect (RAPD) on the right side were present. Computer tomography scan revealed no signs of intraorbital pathology, elevated intracranial pressure or hemorrhages.
  
  
  METHODS
  We interpreted the findings as AION associated with the hyperviscosity syndrome. Liver transplantation had to be carried out in the next days. Three weeks later, vision improved slightly, but RAPD persisted, and disc pallor developed in both eyes. The patient died two months later.
  
  
  CONCLUSIONS
  Central retinal artery and vein occlusions have been described as complications of Essential thrombocythemia, but not of PV. We observed a rare case of bilateral neuropathy suggestive of AION. This condition has so far not been associated with PV.
authors.affiliation: Department of Ophthalmology, University of Bern, Inselspital, Bern, Switzerland.
authors.forename: M S
authors.initials: MS
authors.lastname: Tönz
authors.forename: V
authors.initials: V
authors.lastname: Rigamonti
authors.forename: M E
authors.initials: ME
authors.lastname: Iliev
mesh_terms: D005260:Female; D006801:Humans; D008875:Middle Aged; D018917:Optic Neuropathy, Ischemic / Q000150:complications* / Q000175:diagnosis*; D011087:Polycythemia Vera / Q000150:complications* / Q000175:diagnosis*