 Cancers arising from an organ can be cured in some cases with various combinations of surgery, chemotherapy and radiotherapy. However, once some cancers spread to other organs, treatment with commonly used methods is unlikely to cure the cancer and so treatment is then designed to control the growth of the cancer and the problems it is causing. One newer treatment approach involves targeting a marker antigen called the epidermal growth factor receptor EGFR, which is found on the tumour cells surface, with a specially constructed monoclonal antibody called ch806. 