Radiotherapy is a painless treatment which is extensively used in cancer treatment. It works on a principle of damaging cancerous cells by destruction of DNA inside cells by radiation. It slows down the cancerous cells growth and provides comfort by relieving the patients with cancer symptoms. Cancer is the abnormal growth and spread of cells which arises from a change in single cell. Change may be due to external agents and inherited genetic factors and can affect almost any body part. ... Read more
