Welcome to Blood Nanobots dot com.
 Interesting things are happening at the intersection of medicine and nanotechnology.
Our first inkling of such things came from a 1966 movie "Fantastic Voyage" based on an Isaac Asimov book. The movie and book were about a miniturized medical crew submarining through a patient's circulatory system. It's a great read and a great movie - as the crew in the tiny submarine encounter and destroy various biological intruders within the bloodstream.
 Blood Nanobots are now in the design stages. The hope is that within the next several years, invisibly small blood nanobots will cruise through the body looking for signs of disease, and then destroying the toxins. More than 60 drugs and drug delivery systems based on nanotechnology, and more than 90 medical devices or diagnostic tests, are already being tested, according to NanoBiotech News, a weekly newsletter that tracks the field.
| 
One of the best ways to destroy a tumor is to burn it. But that is difficult to do without frying nearby healthy tissue, especially when the tumor is deep in the body.