In the summer of 2006, an Arlington, Virginia man underwent a series of laser-surgery treatments from a urologist for an enlarged prostate. Several months after the procedures he remained incontinent and he sued his urologist. After a lengthy trial, a jury concluded rather quickly that the doctor did not do anything wrong.
Morale of the story: Medical malpractice is hard to prove, and not every bad result means that someone did something wrong. Medicine is not an exact science and there are always risks associated with every medical procedure. Beware, and ask lots of questions if you are looking at some medical procedure or surgery.