If you touch the wrong part of the brain, you can turn your patient into a monster. Not just figuratively, but literally, with sharp fangs, pointed ears, and green skin
*Actually, as of this writing, I haven't read it myself so I don't really know if you must read it. But I looked at it for awhile, and it seemed like something you must all read. I don't know, maybe I'm wrong, in which case I apologize.
Illustration © Harvey Comics? Or maybe it's public domain?