Free metatarsophalangeal joint to metacarpophalangeal joint transfer - a unique surgical technique.

Giant cell tumors of metacarpal bones is a rare occurrence. The tumor particularly exhibits an aggressive behavior in small bones of the extremities. Different techniques such as curettage with or without bone grafting, en bloc resection (more commonly preferred) and reconstruction have been discussed but a unique way of reconstruction is using the metatarsal for substitution. Other options include the fibular graft or using a portion of the iliac crest. We report the case of a young female with a giant cell tumor of the fourth metacarpal bone where we reconstructed the diseased joint with the metatarsal bone while achieving good local control, preserving lower limb and hand function along with cosmesis. The transfer of osteoarticular ligamentous complexes of the metatarsal bone for reconstruction of metacarpal bone defects is a technique that provides good cosmetic outcomes, excellent function with minimum effects to the donor site function.