Are there different types of testicular cancer?
Cancers of the testicle are named after the type of cell in which they develop. Testicular cancer can be grouped into three types of tumours:
- Germ cell tumours
- Stromal tumours
- Secondary testicular tumours
More than 90% of testicular cancers develop in germ cells, which are responsible for the production of sperm. There are two main types of germ cell tumours; seminomas and non-seminomas. Testicular cancer can include a mix of seminoma and non-seminoma cells or a combination of the different types of non-seminoma. A small number of testicular cancers start in cells that make up the supportive (structural) and hormone producing tissue of the testicles and are known as stromal tumours.
Secondary testicular tumours are caused by cancerous cells that have spread to the testicles from other parts of the body (metastasis). These cancers are much rarer than the previous forms of testicular cancer.
Who is at risk?
Young men between the age of 25 and 49 years are at the highest risk of developing testicular cancer1. The causes of testicular cancer are unknown, however there are possible factors that may increase a man’s risk including:
- Undescended testes at birth
- Family history (father or brother with testicular cancer)
- Previous occurrence of testicular cancer (Around one in 25 men who have had cancer in one testicle are likely to develop cancer in the other testicle at some stage)
- Down syndrome may also increases a man’s risk
There is no known link between testicular cancer and injury to the testicles, sporting strains, hot baths or wearing tight clothes.
What are the symptoms?
Men may experience few or no symptoms of testicular cancer, however important warning signs to watch for include:
- Swelling or a lump in either testicle (usually painless)
- A feeling of heaviness in the scrotum
- Change in the size and shape of the testicles
- Aches or pain in the lower abdomen or groin
- A sudden build-up of fluid in the scrotum
- Pain or discomfort in a testicle or in the scrotum
- Enlargement or tenderness of the breast tissue
What is testicular self-examination (TSE)?
Regular self-examination of the testicles is important for young men, particularly those at risk of testicular cancer. Being familiar with the size, shape and usual level of lumpiness can help you determine if something is not quite right. A testicular self-examination can help a man find any changes in the testes early, so that if treatment is needed it can start as early as possible.