The cancer pattern in African gold miners.

The incidence of cancer among the African workers on the gold mines of South Africa has been studied for the period 1964-68. Considering the degree of selection to which they are subjected, the crude cancer rate was unexpectedly high.The most common cancers were those of the liver, the oesophagus, the respiratory system and the bladder.

The cancer pattern in Africans of the Transvaal lowveld.

An attempt has been made to study the Transvaal lowveld by district and tribe in relation to cancer patterns, and to compare these with those of bordering regions.The lowveld is divided into four districts, running from north to south. There appears to be a real increase in the frequency of liver and bladder cancers from north to south.

The cancer pattern in Africans at Baragwanath Hospital, Johannesburg.

Material on African cancer cases admitted to Baragwanath Hospital, Johannesburg, over the years 1948-64 has been analysed, and it has been possible to obtain a useful incidence rate, a ratio study and a tribal analysis for purposes of comparison. The incidence rate, when compared to an earlier Johannesburg survey, showed a rise in oesophageal cancers for males and females. Both lung and prostate cancers showed rising rates in the men, while the female breast and cervix cancer rates remained relatively constant.