Dr Adyb – Adrian KHAL is an orthopedic surgeon practicing adult and pediatric orthopedics. He works at AP-HM Timone Enfants in Marseille, in the pediatric orthopedics department where he deals more specifically with bone tumors in children. He also carries out oncological surgical missions abroad. During his career, he was able to pass through several reference centers in orthopedics and oncology such as, for example, Necker Enfants Malades and the Rizzoli Orthopedic Institute in Bologna, Italy. He is a member of SOFCOT (French Society of Orthopedic Surgery and Traumatology), GSF-GETO (French Sarcoma Group – Bone Tumor Study Group), EMSOS (European Society of Musculoskeletal Oncology), and FOSTER (Fight Osteosarcoma through European research ), favoring scientific research on the study of bone tumors, musculoskeletal oncology, and massive bone reconstruction in order to combat sarcomas and provide satisfactory functional results for operated patients.