Thought this was pretty cool. I hope he's able to perfect the design.
http://www.popsci.com/science/article/2013-09/robo-maggots-will-munch-through-brain-tumors
Creepy, crawly maggots might be making their way into people's brains. Robot maggots, that is. Inspired by a TV show where plastic surgeons use maggots to eat away dead tissue, neurosurgeon J. Marc Simard of the University of Maryland School of Medicine has been developing a prototype for a larvae-esque robot that could get eat away at a brain tumor from the inside.
http://www.popsci.com/science/article/2013-09/robo-maggots-will-munch-through-brain-tumors