Sherrie Walters had an aggressive form of basal cell cancer, which required her to have a part of her ear, skull, and ear canal removed. Doctors at John Hopkins were able to use rib cartilage to build an entire new ear. She had to grow her new ear under the skin of her arm for a few months.
Check out the link for more pictures! I left some of the more gruesome ones out, to protect the squeamish. While it may seem gross at first, this is pretty amazing stuff.