What is cancer? Cancer is a large group of malignant neoplasms that affect various organs and systems of the body. In fact, cancer is the most common and deadly disease of all malignancies. Every year, more than 40 million people worldwide suffer from cancer, and half of them die from the disease. Cancer is classified as a polyetiological disease because its causes are varied.
History of cancer There are several theories regarding how cancer cells arise - these are genetic failures, viral infections, and environmental carcinogens, but all of them are not official and have not been confirmed during many years of research by scientists. One of the main factors provoking this type of cancer is aging. Over the years, the load on the body increases, metabolism is disrupted, and our chances of fighting malignant tumors tend to zero.
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