Cancer is a condition where cells in a specific part of the body grow and reproduce uncontrollably. The cancerous cells can invade and destroy surrounding healthy tissue, including organs.
Cancer sometimes begins in one part of the body before spreading to other areas. This process is known as metastasis.
1 in 2 people will develop some form of cancer during their lifetime. In the UK, the 4 most common types of cancer are:
There are more than 200 different types of cancer, and each is diagnosed and treated in a particular way. You can find links on this page to information about other types of cancer.
Spotting signs of cancer
Changes to your body’s normal processes or unusual, unexplained symptoms can sometimes be an early sign of cancer.
Symptoms that need to be checked by a doctor include:
- a lump that suddenly appears on your body
- unexplained bleeding
- changes to your bowel habits
But in many cases your symptoms will not be related to cancer and will be caused by other, non-cancerous health conditions.
Read more about the signs and symptoms of cancer.
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