What does Cancer mean? A comprehensive guide for type, causes, diagnosis, treatment of cancer. If we try to understand what Cancer means to a common person, we can refer it to the growth of our cells out-of-control invading other tissues. Our cells become cancerous due to the accumulation of defects, or mutations, in their DNA.
Certain inherited genetic defects (for example, BRCA1 and BRCA2 mutations) and infections may increase the risk of cancer. Environmental factors (for example, air pollution) and poor lifestyle choices—such as smoking and heavy alcohol use—can also damage DNA and lead to cancer.