My thyroid nodule was picked up by a CT scan during my surveillance post bowel cancer treatment. As it is 3a, my consultant says he has monitored for two years and it doesn't seem to have changed much so he wants to discharge me. It is on the isthmus, which I believe is more likely to be cancerous than elsewhere. I am anxious that I will be discharged and the nodule will later prove to have been cancerous but by then will have spread and be fatal. Is there any other test I can ask for? Can I ask for my monitoring to be continued?