This study will be a phase Ⅲ open label interventional case series. Patients with Stage I enucleated retinoblastoma will be randomized to receive chemotherapy(CEV) of 3 cycles or 6 cycles on a monthly basis. Patients will be followed for 24 months.
The purpose of this study is to determine whether 3 cycles of chemotherapy(CEV) are as effective as 6 cycles of chemotherapy(CEV) in the treatment of Stage I enucleated retinoblastoma.