Cancer in human kind is one of major killing disease which is caused by abnormal proliferation of cell growth which divide by themselves. It can spread to other parts of the body through the blood and lymph systems.
Cancer is not just one disease but many diseases. There are more than 100 different types of cancer. Most cancers are named for the organ or type of cell in which they start - for example, cancer that begins in the colon is called colon cancer; cancer that begins in breast called carcinoma breast.