My dad had cancer of the oesophagus,which got taken out.About 6-8 months later he started getting back pain and increasingly was not keeping food down.His wife tried in vain numerous times to contact the surgeon and left messages to no avail.He started bringing up blood a week ago which admitted him into hospital.We now learn the cancer has returned and spread to his liver,on top of a diagnosis of dementia around the same time too which was stated as unrelated.They say there is nothing more they can do for him.Is it plausible to seek any kind of clinical trial which will help prolong his life and lessen his pain?!?