Age: Retinoblastoma is diagnosed most commonly in children below the age of 3 years. Congenital retinoblastomas are usually found during the first year of life, while other retinoblastomas tend to be diagnosed between 1- 3 years of age.
Hereditary – The risk of retinoblastoma is much higher in children with a parent who had the congenital (heritable) form of retinoblastoma. This form mostly occurs as tumours in both the eyes (bilateral retinoblastoma).
Insufficient consumption of fruits and vegetables by expecting mothers.
Exposure to chemicals in gasoline or diesel exhaust during pregnancy
When the father of the child has been exposed to radiation
