A KNEE JOINT PROSTHESIS IS DISCLOSED. THE PROSTHESIS HAS A FEMORAL COMPONENT AND A TIBIAL COMPONENT. A WINDOW IS LOCATED IN THE FEMORAL COMPONENT IN THE REGION BETWEEN THE FEMORAL CONDYLES FORMED IN THE FEMORAL COMPONENT TO ACCOMMODATE A SUPRACONDYLAR NAIL OR OTHER INTRAMEDULLARY DEVICES REQUIRED TO MANAGE PERI-PROSTHETIC FRACTURES.