Testiuclar cancer is rare, accounting for only 1% of all incident cancers and <1% of all cancer deaths in males. However, among men aged 15 to 44 years, these tumours are the most common cancer diagnosed. The median age at diagnosis is 33 years. Incidence rates vary worldwide, with highest incidence rates in Northern European countries, and lowest incidence rates in Asian and African countries. In one European study, the average annual testicular cancer rate was 7.32 per 100,000 men. In the UK there are around 1400 new cases each year, with the highest incidence in those aged 25 to 35 years. In the US, it is estimated that there will be 9610 new cases of testis cancer and an estimated 440 men will die of this disease in 2020. The trend over the past 40 years has been towards an age-dependent increase in the incidence of this disease in the US. The increasing incidence rate of testicular cancer supports the existence of environmental factors and appears to be related to birth cohort (i.e., the year in which born). White men have, by far, the highest incidence compared with African and Asian men. In the US, the incidence in white men is four times that in black men.
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