Frequency of Cancer

Published reports of the relative frequency of prostate cancer in Africa over a 45-year period are shown in Table 3-1.4-13 These data cover the time period from 1950 to 1995. They originate from reports from hospital-based or pathology-based registries and more recently from population-based cancer registries. The relative frequency of prostate cancer ranges from a low of 1.9% of all histologically confirmed cancers in black Kenyan men to a high of 11% of all cancers in black Liberian men. Although the actual prevalence of prostate cancer in Africa is not known, it is the most common cancer in males over 60 years of age. in black Africans the percentage frequency ranges from 1.9 to 11.3% whereas for black and white Americans, it is 29.9% and 28.3%, respectively.14 In the mid-1980s it is estimated that prostate cancer constituted 15% of all cancers diagnosed in Americans.15 In 1995, prostate cancer constituted 36% of all tumors diagnosed in American men and 19.5% of all cancers diagnosed in Americans.16

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