Cancer is a general term used to describe about 200 different types of malignant tumours. We know that any living cell in the body can become cancerous. Since there are many types of cells in the human body such as blood cells, nerve cells, fibroblast cells, bone cells, muscle cells and epithelial cells, there are as many types of cancer. A generic name is given to the cancer depending upon the type of the cell of its origin. The common types of cancer include carcinoma, sarcoma, myeloma, leukaemia, lymphoma and brain cancer.