Does retinoblastoma stay in one place?

Not always: There is a risk of metastasis of retinoblastoma to adjacent structures or to distant sites via hematogenous metastasis.

No: This is a malignant tumor of the retinal elements. It grow like any malignancy, can spread in the eye or elsewhere. It needs immediate attention to prevent vision loss or death. It commonly is inherited so families need to be advised about it. It occurs in infancy or at birth but not in older age.