What Is Retinoblastoma?

Retinoblastoma is cancer of the eye. It begins in the retina, the layer of nerve cells lining the back of the eye. It happens when nerve cells in the retina change, growing in size and number. The cells eventually form a tumor. The cells usually spread in and around the eye. They can also spread to other parts of the body, including the brain and spine.

Retinoblastoma usually affects young children, though it can sometimes occur in adults. Children with retinoblastoma may have inherited a gene from their parents that causes this disease. These children tend to get retinoblastoma at an earlier age, and in both eyes.