He saw the surgeon, who is completely puzzled by the fact that his blood tests are showing something that shouldn't be there. His adamant he removed everything. So, now we wait again - Dad has to have another blood test in 3 months. If it's still showing something, then he has to have a bone scan and see what that shows. Have to admit i'm scared - the next 3 months are going to be hard on Dad, and Mum :(