title: Branch retinal vein occlusion associated with the 20210 G-to-A prothrombin variant.
abstract: OBJECTIVE
  To describe a case of branch retinal vein occlusion (BRVO) in a patient who tested positive for the 20210 A allele of the prothrombin (PT) gene.
  
  
  METHODS
  A 48-year-old man had visual loss in the right eye secondary to BRVO confirmed by ophthalmoscopy and fluorescein angiography. His medical history was not remarkable for common risk factors for retinal occlusive diseases.
  
  
  RESULTS
  Laboratory tests for hypercoagulability were positive for PT 20210 A variant. The patient's family tested negative for the PT variant.
  
  
  CONCLUSIONS
  Laboratory tests for coagulopathy, including the PT 20210 A variant, should be added to the examination of patients with central or BRVO, especially if most common risk factors for thrombosis have been excluded.
authors.affiliation: Department of Ophthalmology, University Hospital "La Fe", Valencia, Spain.
authors.forename: C
authors.initials: C
authors.lastname: Peris Martínez
authors.forename: J
authors.initials: J
authors.lastname: Aviñó Martínez
authors.forename: M
authors.initials: M
authors.lastname: Díaz-Llopis
authors.forename: E
authors.initials: E
authors.lastname: España Gregori
authors.forename: J L
authors.initials: JL
authors.lastname: Menezo
authors.forename: A
authors.initials: A
authors.lastname: Vayá
mesh_terms: D001766:Blindness / Q000209:etiology; D005451:Fluorescein Angiography; D014644:Genetic Variation; D006801:Humans; D008297:Male; D008875:Middle Aged; D017354:Point Mutation; D011516:Prothrombin / Q000235:genetics*; D012170:Retinal Vein Occlusion / Q000150:complications / Q000235:genetics* / Q000473:pathology; D014792:Visual Acuity
chemical_list: D011516:Prothrombin