A percutaneous implant 10 comprises an intramedullary bone fixation portion 20, a spigot portion 50 for the attachment of an external prosthesis, and an enlarged, pear-shaped portion 40 having a porous outer region. The bulbous portion 40 is disposed between the spigot portion 50 and a collar 30 which has a plurality of through holes 34 adjacent to its edge. The bone-fixation portion 20 may have extending parallel thereto a plate (72, figure 4) for attachment to the side of a bone. An alternative implant (80, figure 5) has an enlarged portion 90 comprising a mesh of wire mesh material around a central rod.
