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An increased incidence of prostate cancer among African-American men (now the second most common cause of cancer death) has been attributed mainly to the introduction of screening techniques, which have enabled earlier diagnosis of patients. This study reviewed male cancer patients recorded in a Nigerian cancer registry to assess the current trends in prostate cancer in Nigeria. For comparison, data were broken into two groups: 1980-1988 and 1989-1996. Only the top 10 cancers occurring in both periods were considered initially in this report. For emphasis, an analysis of adult male cancers was done per decade since 1960. Results show that prostate cancer has become the number one cancer in Nigerian men and constitutes 11% of all male cancers. The median age of patients was 67.5 years (variance 5.6), and the mean age was 71.4 years (variance 14.3). These results indicate that despite the absence of screening programs in Nigeria, the number of prostate cancer cases has increased. The known risk factors probably contribute to a varying degree among Nigerians, who are generally of average build or in the low-normal range for body mass index. Moreover, the role of genetics cannot be underplayed. Given its biological characteris, more cases of prostate cancer probably would be recorded among this population if screening were undertaken. (Abstract di Increased incidence of prostate cancer in Nigerians)

Sempre dal secondo articolo There is a great variation in the geographic epidemiol- ogy of the disease, 3-5 and environmental factors appear to be significant contributors to this difference. However, African-American men have a 47% higher incidence and a 128% higher mortality than white men in the same geo- graphic location.6.7 Even within the African continent, major variations exist in prostate cancer incidence. In most of the eastern, western, and southern countries of the continent, prostate cancer ranks in the top 10 and usually the top 5 for male cancers, while in Algeria, prostate can- cer ranks as number 15 (Table 1). This low incidence among Arabic men was noted previously by Akhtar et al.8 In Harare, Zimbabwe, prostate cancer ranks number 2 among Europeans and number 5 among Africans.5

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