Basic Principles: General -- Diagnosis -- Development of the musculoskeletal system. Diseases and injuries by site: Spine, trunk -- Pelvis, hips and thighs -- Knee and lower leg -- Foot and ankle -- Upper extremities. Systematic aspects of musculo-skeletal disorders: Traumatology - basic principles -- Axes and lengths -- Infections -- Juvenile rheumatoid arthritis -- Tumors -- Hereditary diseases -- Neuro-orthopaedics.