Testicular germ cell tumours - still many challenges.

The authors reflect on testicular cancer and on testicular germ cell tumors. They suggest that a large geographical variation in the incidence of testicular germ cell cancers has puzzled researchers who are interested in testicular cancer epidemiology. They argue that in 2012 there are still many questions which need to be answered regarding testicular cancer and its treatment and that medical professionals should be encouraged by progress which has been made in the area since 1982.