Testis cancer incidence — suggestion of a world pattern

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Abstract
Testis carcinoma may be an indicator of damage to the genome, and the increase in morbidity found in various countries may therefore be of wider interest than immediately apparent. Changes in morbidity from testis cancer, and international differences are largely determined by the incidence among younger men. The author has therefore compared rates for the three consecutive five-year age groups 25 to 39 years from a number of countries with cancer registration. The lowest rates are found for Africans and US negroes, with slightly higher rates found in Asia. Increasing rates are found in Norway, Hamburg, and Denmark where incidence is highest, while Finland shows apparently stable and low rates. It is suggested that rates are increasing in England. Morbidity rates vary in the United States. In Canada, Quebec shows lower rates than other provinces. It is suggested to look for prenatal causative factors.

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