[Medial femoral condyle free flap for reconstruction of carpometacarpal bone defect after giant cell tumour of tendon synovial sheath resection].

We report the case of a 23-year-old patient treated for a large giant cell tumour of the synovial sheaths of the ulnar edge of the hand and wrist invading the triquetrum, the hamatum, the ulnar part of the capitate as well as the bases of the 3rd, 4th and 5th metacarpals and the floor of the Guyon's canal and the carpal tunnel. A monobloc resection was performed in a healthy margin ; the loss of bone substance was 7×3.5cm. We performed a bone reconstruction using a cortico-cancellous medial femoral condyle free flap of 8×4cm. Postoperative follow-up was uneventful and bone consolidation was achieved at 2,5 months postoperatively. The cortico-cancellous medial femoral condyle free flap is an interesting option for treating small and medium size bone loss in the hand and wrist. Its use in its pure bone form or in its chimeric form with muscle, cartilage or skin opens up a wide range of choices for the reconstructive surgeon.