An orthopaedic fixation assembly (100, 200) adapted to be implanted in a bone of a patient, comprising: a main body (104, 240) adapted for insertion into the bone, the body comprising: a longitudinally extending stem (106, 202) having a proximal end (108, 204), a distal end (110, 206), and a cavity body (112, 208) defined between the proximal end and the distal end, a spindle (114, 212, 410) configured to be attached to the proximal end, the spindle comprising: a housing (116, 214) having an annular flange (118, 216), the annular flange configured to interface with an osteotomy surface of the bone, and an anchor plug (220, 300) configured to be received in the cavity body and securable to the longitudinally extending stem, the anchor plug comprising: a generally cylindrical body (222, 304) having an elongated shaft extending downwardly therefrom, the cylindrical body comprising; a top portion; a bottom portion; and a peripheral side wall having a plurality of secondary apertures defined therethrough, characterized in that the cavity body comprises at least one aperture configured to receive at least one transverse fixation pin therethrough, wherein at least one aperture comprises an elongated slot, and in that the plurality of secondary apertures are configured to align with the at least one aperture of the cavity body. a main body (104, 240) adapted for insertion into the bone, the body comprising: a longitudinally extending stem (106, 202) having a proximal end (108, 204), a distal end (110, 206), and a cavity body (112, 208) defined between the proximal end and the distal end, a spindle (114, 212, 410) configured to be attached to the proximal end, the spindle comprising: a housing (116, 214) having an annular flange (118, 216), the annular flange configured to interface with an osteotomy surface of the bone, and an anchor plug (220, 300) configured to be received in the cavity body and securable to the longitudinally extending stem, the anchor plug comprising: a generally cylindrical body (222, 304) having an elongated shaft extending downwardly therefrom, the cylindrical body comprising; a top portion; a bottom portion; and a peripheral side wall having a plurality of secondary apertures defined therethrough, a longitudinally extending stem (106, 202) having a proximal end (108, 204), a distal end (110, 206), and a cavity body (112, 208) defined between the proximal end and the distal end, a spindle (114, 212, 410) configured to be attached to the proximal end, the spindle comprising: a housing (116, 214) having an annular flange (118, 216), the annular flange configured to interface with an osteotomy surface of the bone, and an anchor plug (220, 300) configured to be received in the cavity body and securable to the longitudinally extending stem, the anchor plug comprising: a generally cylindrical body (222, 304) having an elongated shaft extending downwardly therefrom, the cylindrical body comprising; a top portion; a bottom portion; and a peripheral side wall having a plurality of secondary apertures defined therethrough, a top portion; a bottom portion; and a peripheral side wall having a plurality of secondary apertures defined therethrough, the cavity body comprises at least one aperture configured to receive at least one transverse fixation pin therethrough, wherein at least one aperture comprises an elongated slot, and in that the plurality of secondary apertures are configured to align with the at least one aperture of the cavity body.