Cancer is caused by changes to the DNA of a cell.
These changes can be caused by a variety of factors, including genetics, environmental exposures, and lifestyle choices.
When a cell's DNA is damaged, it can start to grow and divide uncontrollably, forming a tumor.
Tumors can invade nearby tissues and spread to other parts of the body through the blood or lymphatic system.
Cancer cells are different from normal cells in a number of ways.
Cancer cells can grow and divide uncontrollably.
Cancer cells can evade the body's immune system.
Cancer cells can promote angiogenesis, the growth of new blood vessels, which helps the tumor to grow and spread.
Cancer cells can metastasize to other parts of the body.
Cancer cells can alter their metabolism to support their growth and survival.