Osteosarcoma is a solid tumor of bone origin. Most of these tumors are managed primarily by orthopedic oncologic surgeons. Rib tumors and metastatic tumors (often to the lung) are managed by pediatric surgeons. We work in close collaboration with Dr Maseo Watanabe (pediatric oncology), and orthopedic surgeons Dr. Bruce Mallin and Dr Matt Seidel for bone tumors in difficult or complex locations. The expertise of multiple specialists is essential in appropriate management of these complex tumors.