Incidence of retinoblastoma in the Bantu of South Africa.

There is no report on the incidence of retino- blastoma in the Bantu of South Africa. The incidence of any disease entity in a population often lends a clue to its aetiology and this forms an important part in the epidemiological study of the disease entity. This also applies to the study of neoplastic conditions and, as regards this report, to retinoblastoma in particular. The patients reported in this study all came from the Johannesburg area of South Africa and were seen mainly at the St John Eye Hospital, Baragwanath, during the 20-year- period from 1955 to 1976.