Cancer is a generic term for a large group of diseases that can affect any part of the body. Other terms used are malignant tumours and neoplasms. One defining feature of cancer is the rapid creation of abnormal cells that grow beyond their usual boundaries, and which can then invade adjoining parts of the body and spread to other organs. This process is referred to as metastasis. Metastases are the major cause of death from cancer. According to World Health Organisation (WHO) 8.2 million people worldwide died from cancer in 2012 and 60% of the world’s total new annual cases occur in Africa, Asia and Central and South America.