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CANCER
Cancer is a type of disease where cells grow out of control, divide and invade other tissues.
In a person without cancer, cell division is under control. In most tissues, healthy cells divide in a controlled way and copy themselves to create new healthy cells. With cancer, this normal cell division goes out of control. Cells change their nature because mutations have occurred in their genes. All the daughter cells of cancer cells are also cancerous. Such cells are responsible for growing more cancer cells in the body. If the abnormal cells do not invade other tissues or organs, but just divide and swell up their original tissue, this is not called "cancer". It is called a tumour. Tumours are usually not a threat to life because they can be cut out. However, some tumours occur in places where they cannot be cut out, and they can be fatal.

As of the latest statistics, cancer accounts for approximately 28% of all deaths in the UK, making it the leading cause of death. The most common types of cancer seen in the UK include breast, lung, prostate, and colorectal cancers. In 2020, it was estimated that there were over 390,000 new cases of cancer in the UK, a number that has continued to rise due to factors such as an aging population and lifestyle choices, particularly smoking, poor diet, and lack of physical activity.

Cancer is a multifaceted disease, and its development can be attributed to a combination of genetic, environmental, and lifestyle factors. Tobacco use remains the most significant preventable cause of cancer, particularly lung cancer. Other risk factors include excessive alcohol consumption, obesity, exposure to certain chemicals, and prolonged sun exposure leading to skin cancers, such as melanoma.

Early detection is crucial in improving survival rates. The UK has implemented national screening programs for breast, cervical, and bowel cancer aimed at identifying these diseases in their early, most treatable stages. Advances in medical research have led to improvements in treatment modalities, including surgery, chemotherapy, radiotherapy, and targeted therapies such as immunotherapy. Notably, the Cancer Drugs Fund in the UK plays a pivotal role in providing access to these innovative treatments for patients.