????? ??? ??, ?? ??? ??? ??? ? ?? ?? ??????. ???? ???? ??? ? ?? ?? ??? ?????.???? ??? ? ?? ??: ??? ??? ???? ???? ??? ? ????.??? ?? ??: ???? ??? ??? ? ?? ?? ??? ?? ???? ?????.Retinoblastoma can be a malignant tumor of your creating retina that occurs in young children, ordinarily prior to age five years. Retinoblastoma develops from cells that have