Asymmetry of familial exudative vitreoretinopathy. 
A 2-month-old male infant presented with unilateral leukocoria suspected to be retinoblastoma.  Fundus examination and fluorescein angiography confirmed the diagnosis of bilateral familial exudative vitreoretinopathy with markedly asymmetric presentation (Stage 3/Type 5 in the right eye and Stage 2/Type 3 in the left eye).