What Causes Cancer?
Normally, cancer cells divide and grow to form a tumour, and then they spread to other parts of the body. These cancer cells need a blood supply to survive and may invade nearby areas and other organs. Normal cells do not move around in the body, but can become abnormal and cause a tumour. They also manipulate the immune system, which is responsible for fighting infections, to help them grow. If the body is unable to detect cancer cells in time, the tumor may continue to spread, and the condition will be worse.
The transformation of a normal cell into a cancer cell occurs as a chain reaction. The initial mistakes compound into more serious errors, allowing cancer cells to escape more control. It is this rebellion-like scenario that makes it difficult to combat cancer, and is the result of the evolution of the cells against the body’s design. This ongoing process, known as clonal evolution, drives the progression of the tumor and the spread to other parts of the body.
In order to treat and cure cancer, doctors must know how the disease started in a cell. In cancer, the cell reproduces uncontrolled. It ignores the body’s signals, growing uncontrolled until it becomes a tumor. This means that cancers crowd out healthy cells in the bloodstream, forming tumours. Although this process is normal, it is characterized by a lack of control. The growing tumors can destroy surrounding healthy tissues and invade new ones.
There are two main types of cancer. First, there is the cancer-causing mutation. It is known as a driver. The driver mutation is responsible for driving the growth of cancer cells, whereas the passenger mutations are responsible for giving the cancer its immortality. The other type of cancer, referred to as tumor suppressors, is caused by a lack of tumor suppressors. This is why cancer has a high incidence rate among people.
Infections are the main cause of cancer, affecting 18% of all cancers worldwide. The proportion of infections is higher in the developing world, but it differs amongst different regions. The main causes of cancer are viruses, but cancer bacteria and parasites can also cause it. Infections may also be a cause. The virus can also invade the body’s tissues and cause a tumor. Its effects on the immune system include preventing the spread of infection.
Cancer is an epidemic that affects millions of people worldwide. More than 200 different types of cancer are classified as “biological carcinogens”. These agents cause cancer by altering the DNA of cells. Certain viruses and parasites are biological carcinogens, and can cause cancer in the body. This is why they are considered biochemical carcinogens, and are categorized as “biological carcinogens”. Many diseases that cause cancer also have a genetic component.