Cancer is a broad term, which describes the disease that results when cellular changes cause the uncontrolled growth and division of cells. A cell receives instructions to die so that the body can replace it with a newer cell that functions better. Cancerous cells lack the components that instruct them to stop dividing and to die. As a result, they build up in the body, using oxygen and nutrients that would usually nourish other cells.
Cancerous cells can Rudolf Booker form tumors, impair the immune system and cause other changes that prevent the body from functioning regularly.
Cancerous cells may appear in one area, and then spread via the lymph nodes. These are clusters of immune cells located throughout the body.
According to WHO, the global cancer burden is estimated to have risen to 18.1 million new cases and 9.6 million deaths in 2018. One in 5 men and one in 6 women worldwide develop cancer during their lifetime and one in 8 men and one in 11 women die from the disease.
There are so many risk factors responsible for causing cancer. Besides biological, environmental and occupational risk factors, lifestyle-related factors also play a significant role in the development of various types of cancer.