Cancer is defined as the uncontrollable proliferation of abnormal cells in any part of the body. Cancer cells, malignant cells, or tumour cells are all terms used to describe these aberrant cells. These cells have the ability to invade healthy human tissues. The name of the tissue from which the aberrant cells originated is used to identify many tumours and the abnormal cells that make up the cancer tissue.

Anything that causes abnormal development of a normal bodily cell has the potential to produce cancer. Cell abnormalities can be caused by a variety of factors, some of which have been associated with the development of cancer. Some cancers have no known causes, while others have environmental or lifestyle triggers or may develop from multiple causes like:

• Exposure to chemicals or hazardous compounds
• Ionizing radiation
• Pathogens
• Genetics