>>it's very difficult to kill 100% of cancer cells, and what winds up happening is you kill 99% of them that are most susceptible to being killed by chemo givin

>>it's very difficult to kill 100% of cancer cells, and what winds up happening is you kill 99% of them that are most susceptible to being killed by chemo giving the 1% that is most resistant more room to grow. Hence the recurrence is much more difficult to treat. Isn't the point of a device like this that it can increase the concentration of chemo in tumors while keeping the concentration as low as possible in non-cancerous tissue? Which should help that point (that is, manage to kill off enough cancer cells that the immune system or some other treatment can wipe out any surviving). (As someone else noted, the article referenced some paper supporting doing this method.) Let us all hope this works really well.