Testicular cancer refers to cancer that develops within one or both of the testicles. Testicular cancer most commonly forms in germ cells, which are cells that produce sperm.
The two main types of testicular cancer include:
- Seminoma testicular cancer – the tumour does not include any subtypes. This typically grows more slowly compared to non-seminoma testicular cancer
- Non-seminoma testicular cancer – a rarer cancer where the tumour contains at least one of the following subtypes: teratoma, choriocarcinoma, yolk sac tumour and embryonal carcinoma, and develops more quickly than seminoma cancers
Testicular cancer is the most commonly diagnosed cancer in young New Zealand men, with 137 New Zealand men diagnosed with testicular cancer in 2013. However, it is most prevalent in men aged between 30 and 34 years.