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    1. Home
    2. Health and wellbeing
    3. Illnesses and conditions
    4. A to Z

    Testicular cancer

    Testicular cancer is one of the less common cancers. It occurs most often in men between 15 and 49 years of age. It's important to be aware of what feels normal for you and see your GP if you notice any changes in your testes.

    The testes

    The testes are the two oval-shaped male sex organs.

    Each testicle sits inside the scrotum, on either side of the penis.

    The testes are an important part of the male reproductive system.

    This is because they produce sperm and the hormone testosterone, which plays a major role in male sexual development.

    Symptoms of testicular cancer

    Typical symptoms are a painless swelling or lump in one of the testes, or any change in shape or texture of the testes.

    The swelling or lump can be about the size of a pea but may be larger.

    Most lumps or swellings in the scrotum aren't in the testicle and aren't a sign of cancer, but they should never be ignored.

    Other symptoms

    Testicular cancer can also cause other symptoms, including:

    • an increase in the firmness of a testicle
    • a difference between one testicle and the other
    • a dull ache or sharp pain in either testicle, or your scrotum, which may come and go
    • a feeling of heaviness in your scrotum

    When to see your GP

    See your GP if you notice a swelling, lump or any other change in either testicle.

    Lumps within the scrotum can have many different causes.

    Testicular cancer is rare.

    Your GP will examine you and if they think the lump is in your testicle, they may consider cancer as a possible cause.

    Less than four per cent of scrotal lumps or swellings are cancerous.

    If you do have testicular cancer, the sooner treatment begins, the greater the likelihood that you'll be cured.

    If you think you might have a sexually transmitted infection and don't feel comfortable visiting your GP, you can go to your local sexual health clinic, where a healthcare professional will be able to examine you.

    Metastatic cancer

    If testicular cancer has spread to other parts of your body, you may also experience other symptoms.

    Cancer that has spread to other parts of the body is known as metastatic cancer.

    Around five per cent of people with testicular cancer will experience symptoms of metastatic cancer.

    Symptoms of metastatic testicular cancer can include:

    • a persistent cough
    • coughing or spitting up blood
    • shortness of breath
    • swelling and enlargement of male breasts
    • a lump or swelling in your neck
    • lower back pain

    Causes of testicular cancer

    The exact cause or causes of testicular cancer are unknown.

    But a number of reasons have been identified that increase a man's risk of developing it. The three main risk factors are described below.

    Undescended testes

    Undescended testicles is the most significant risk factor for testicular cancer.

    Around three to five per cent of boys are born with their testes inside their abdomen. They usually descend into the scrotum during the first year of life, but in some boys the testes don't descend.

    Family history

    Having a close relative with a history of testicular cancer or an undescended testicle increases your risk of also developing it.

    Previous testicular cancer

    Men who've previously been diagnosed with testicular cancer are between four and 12 times more likely to develop it in the other testicle.

    For this reason, if you've previously been diagnosed with testicular cancer, it's very important that you examine your other testicle regularly, to detect any changes.

    • How to check your testicles

    Treatment for testicular cancer

    Treatment almost always includes the surgical removal of the affected testicle. It doesn't usually affect fertility or the ability to have sex.

    In some cases, chemotherapy or, less commonly, radiotherapy may be used, depending on the type of testicular cancer and how advanced it is.

    The health professional looking after your care will discuss with you the most appropriate treatment.

    How common is testicular cancer

    Testicular cancer is a rare type of cancer, accounting for just one per cent of all cancers that occur in men.

    Testicular cancer is unusual compared with other cancers because it tends to affect younger men.

    Although it's uncommon overall, testicular cancer is the most common type of cancer to affect men between the ages of 15 and 49.

    White men have a higher risk of developing testicular cancer than men from other ethnic groups.

    Outlook

    Testicular cancer is one of the most treatable types of cancer and the outlook is one of the best for cancers.

    In Northern Ireland 97.8 per cent of men who are diagnosed with testicular cancer will be alive at five years after treatment.

    Almost all men who are treated for the most common type of testicular tumours are cured.

    It's rare for the condition to return more than five years later.

    • Testicular cancer

    More useful links

    • Northern Ireland Cancer Network
    • Action Cancer
    • Marie Curie
    • Cancer Focus Northern Ireland
    • Macmillan Cancer Support
    • Cancer Research UK

    The information on this page has been adapted from original content from the NHS website.

    For further information see terms and conditions.

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