After the surgeon has removed the testicle (orchidectomy) the tissue is examined under a microscope. This will find out the type of testicular cancer you have.
Most testicular cancers develop from germ cells in the testicles, so they are also called germ cell tumours (GCTs). In men, germ cells produce sperm. The term testicular cancer is for all types of testicular tumour.
There are two main types of testicular germ cell cancer:
Seminomas usually happen in men aged 15 to 55. About 40 to 45 in 100 (40 to 45%) of men with testicular cancer have a seminoma.
Non-seminomas most often affect men aged 15 to 35. They happen in about 40 to 45 in 100 (40 to 45%) of men with testicular cancer.
Non-seminomas are made of different types of cells. They can be made of just one cell type, or they may be made of a mixture. They include:
- embryonal tumours
- yolk sac tumours
Sometimes, non-seminomas can be combined with seminomas.
We have more information about testicular cancer treatment.