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Abstract
A survey of all hospitals in the city of Riyadh for retinoblastoma cases presenting during the period 1982–1986 was performed; 22 cases (16 females and six males) were identified. The cumulative live births in the city of Riyadh for the same period numbered 254,780. The authors report the cumulative incidence of retinoblastomas in Riyadh, Saudi Arabia as 1:11580 live births per year.