Testicular cancer primarily affects younger men and is the most common form of cancer in men aged between 15 and 44.
Testicular cancer is still quite rare, with nearly 2,000 new cases a year in the UK.
Since 1975, the incidence of testicular cancer has more than doubled - and the reasons for this are not yet known.
Thanks to advances made at the Everyman Centre testicular cancer is, with treatment, 97% curable. And that figure rises to 99% curable if it's caught in the early stages.
Testicular cancer causes around 70 deaths every year in the UK.