A humeral prosthesis includes a first body having a first body articulating surface defining a generally circular outer periphery, and a first centerline axis. The first body having a support surface opposite to the first body articulating surface, the first body is hollow and configured to receive a head of the humerus, and a stem extending away from the support surface, the stem defining a second centerline axis which is coincident with the first centerline axis. The prosthesis further includes a second body in the form of a flange which extends laterally from a portion of the circular outer periphery, the first body articulating surface and a surface of the second body defining a boundary portion between them which is generally smooth and continuous, wherein the second body is located superiorly and the surface of the second body which bounds the first body articulating surface is a second articulating surface.
