ABSTRACT
Cancer is a group of diseases characterized by uncontrolled growth and spread of abnormal cells that can iniltrate to other parts of the body through the blood and lymphatic systems. Unlike normal cells, cancer cells do not undergo programmatic death known as apoptosis and instead continue to grow and divide. There are more than 100 different types of cancer. The aetiology of cancer is multifactorial and involves a very complex process known as carcinogenesis. Cancer carcinogenesis is discussed in Chapter 2.
