Multiple Heritable and Acquired Risk Factors in a Case of Recurrent Retinal Vein Occlusion.

A 40 year old female presented with branch retinal vein occlusion in the right eye followed by a second episode, a year later, of central retinal vein occlusion in the left eye. The patient was found to be heterozygous for factor V Leiden and factor V HR2 haplotype G5380A. She had a history of use of oral contraceptives, had reduced levels of tissue plasminogen activator, positive for lupus anticoagulant and diagnosed with hypertension post second episode of RVO. Presence of both heritable and acquired thrombophilia along with hypofibrinolysis induced by reduced levels of tissue plasminogen activator might have led to the recurrence of retinal vein occlusion in this patient. This case illustrates the contribution of multiple hereditary and acquired risk factors in the clinical manifestation of recurrent retinal vein occlusion thereby warranting the application of a more thorough work-up in such cases. The case also briefly touches on the fact that treatment for every RVO cannot be the same and should be decided by taking into consideration the associated risk factors.