A surgical implant for supporting a prosthetic device at a distal end of an amputated limb, including:a cup having a base and surrounding side wall for defining therein a volume for accommodating a terminal end of a bone of the amputated limb;a central intramedullary stem extending from the cup base for insertion into a medullary cavity of the bone;a plurality of extramedullary struts extending from the side wall generally parallel to the central intramedullary stem and locatable in contact with or in a closely adjacent relation with an outer surface of the bone; andan attachment member extending from an outer face of the cup base.