A recent US research, published in the journal Science, shows that about two-thirds of cancer mutations happen due to DNA copying errors.
The team of scientists from the Johns Hopkins Kimmel Cancer Center studied mutations that drive abnormal cell growth in 32 different types of cancer. Using DNA sequencing and epidemiological data, they developed a mathematical system of assessing the role of genetic copying errors in cancer.
This discovery can explain why people who lead a healthy life and have a family history without cancers often get this condition. According to the co-author of the research Dr. Bert Vogelstein, cancers triggered by copying errors with no regard how good the environment is.