Some tumours appearcapable of throwing up a "barrier" around their fringes which stops immune cells getting hold of fragments of the tumour which can be used to coordinate an attack on the abnormal cells.
"This is supposed to be a very important election because we will choose Dietmen who will make policies for Japan in the next century, but I'm frustrated because none of the parties or their leaders appearcapable of addressing what they really want to do, " he says.