What is cancer & cancerous tumours

We’re here to get the best possible life outcomes for every cancer patient. We do that by combining the right clinical teams with innovative and effective treatments.

What is cancer?


There are over 100 different types of cancer. When abnormal cells multiply in an uncontrolled way, that’s cancer. Sometimes they spread into other tissues, affecting other parts of the body.

  • Some growths are harmless (benign). They don’t spread to other parts of the body. But they can put pressure on areas around them. They are often treated with surgery or sometimes with radiation oncology to reduce the risk of them returning
  • Harmful cancer growths are called malignant tumours. They usually multiply faster than benign ones.

What are primary and secondary tumours?

A primary tumour is where a cancer starts. If it spreads to other parts of the body, that’s a secondary tumour or metastasis.

Malignant tumours can be solid or liquid. Liquid cancers like leukaemia involve blood. Cancer and its treatments can also affect the lymphatic, immune and hormone systems. Solid tumours can form in any organ.


What are the most common cancers?

Some of the most common cancers in women are breast cancer and bowel cancer. In men, prostate cancer is the most common, followed by bowel cancer.

How is cancer treated?

There are a lot of factors that influence how cancer is treated:

  • The type of cancer
  • Where the tumour’s located
  • How fast it’s growing
  • How advanced the cancer is
  • Your age and general health
  • How you’d like your cancer to be treated

We’re constantly challenging ourselves to design better care. We personalise care for the patient and their condition so it’s often a combination of therapies like surgery, radiotherapy, chemotherapy, hormonal therapy, dietary changes and other holistic care.


Meet our doctors

Everything we do is focused on designing better care for our patients. With a network of 12 specialist oncology treatment centres across the UK, we provide the most up-to-date treatments and technology as standard.

We attract and retain some of the most experienced doctors in the country, who all have a passion for improving patient outcomes and specialise in the treatment of different types of cancer.

Meet our doctors

Learn more

News and events

Read our latest news from across the globe. Learn about updates in technology, clinical advancements and new centre launches.


GenesisCare is highly active in clinical research. Our understanding of the treatments available to combat cancer today would not be possible without clinical research.

Who we are

We are 2,400 highly trained healthcare professionals and support staff across Australia, the U.K. and Spain designing innovative treatments and care for people with cancer and heart disease.