Jacob A’s lower leg was amputated after a work accident. But his foot was fine, so in Israel’s first “rotationplasty” operation, doctors at Haifa’s Rambam hospital turned it upside down and made the ankle joint into a knee joint. Once Jacob has a prosthetic fitted, he should be able to walk normally.
http://aforam.org/his-ankle-replaces-knee-function-after-rare-surgery-at-rambam/