Gastrocnemius musculotendinous flap for reconstruction of extensor mechanism after proximal tibial tumor resection

Tumor prosthetic replacement and soft tissue reconstruction with a gastrocnemius muscle flap has been accepted as a standard procedure after proximal tibial resection for bone tumor. However, the extent of recovery of the muscle strength of the extensor mechanism has been unpredictable. We report a case of proximal tibia osteosarcoma in which the tumor was widely resected and replaced with tumor prosthesis. The extensor mechanism was reconstructed using a gastrocnemius flap including its tendinous part.