Cancer is the name given to a complex of diseases. (1) The Greeks are said to be the first discoverers of cancer way back in the 4th or 5th Century BCE. The oldest proof of the presence of cancer was found by Louis Leakey in Kenya in 1932. Leakey found a mandible with tumour. (2) Cancer begins in the cells, which are the building blocks of body. Normally, body forms new cells as needed, replacing old cells that die.(3) In cancer cells the normal control system that prevent cell overgrowth and the invasion of other tissues are disabled. These altered cells divide and grow in the presence of signals that normally inhibit cell growth; therefore, they no longer require special signals to induce cell growth and proliferation. If proliferation is allowed to continue and spread, it can be fatal. In fact, almost 90% of cancer - related deaths are due to tumour spreading – a process called metastasis. (3 - 4)