PART I. Introduction: Missions of the International Societies in Sports -- Collaboration with International Sports Federations (FIFA, UEFA, etc..) -- Young Scientists for the Future of Sports Traumatology -- Medicolegal Items in Orthopaedic Sports Medicine: Perspective from an Orthopaedic Surgeon -- Medicolegal Items in Orthopaedic Sports Medicine: Perspective from a Lawyer -- Study Design, Reviewing and Writing in Orthopaedics, Arthroscopy and Sports Medicine -- Publishing for Sports Medicine -- Studies on Orthopaedic Sports Medicine: New Horizons -- Research on Measuring in Vivo Joint Motion and Ligament Function: New Developments -- Surgery in Sports Traumatology: Research Pearls -- PART II. Shoulder Injuries: Shoulder Anatomy and Biomechanics of the Rotator Interval -- Anatomy and Portals in Shoulder Arthroscopy -- Bone Deficiency of the Glenohumeral Joint -- Pathogenesis of Rotator Cuff Tears, Implications on Treatment -- Arthroscopic Repair of Rotator Cuff Disorders -- Double Row Versus Single Row Arthroscopic Rotator Cuff Repair -- Rotator Cuff Repair Augmented with Platelet Rich Plasma -- New Technologies In Shoulder Rotator Cuff Surgery -- Posterosuperior and Anterosuperior Impingement -- Internal Impingement -- SLAP Lesions -- Shoulder Instability -- Recurrent Dislocation of the Hypermobile Shoulder -- Humeral Avulsion Glenohumeral Lesions of Shoulder -- Acute Posterior Dislocations and Posterior Fractures-Dislocations -- Neglected Posterior Dislocations and Treatment Modal ities -- Posterior Shoulder Pain -- Nerve Decompressions: Principles and Different Techniques -- Arthroscopic Release of the Suprascapular Nerve -- Sports Injuries From the Sternoclavicular to the Acromioclavicular Joints -- Acromioclavicular Joint Problems and Reconstruction -- Biceps Tendon Injuries -- Sports Spesific Traumatic Shoulder Injuries -- Treatment of Shoulder Fractures Under Arthroscopic Control -- Clavicula Fractures -- Prevention Strategies of Shoulder Injuries -- Rehabilitation and Re turn to Sports after Conservative and Surgical Treatment of Shoulder Injuries -- Accelerated Rehabilitation of Shoulder Injuries in Athletes -- Thoracic Outlet Compression Syndrome and Its Surgical Treatment Modalities -- PART III. Elbow and Wrist Injuries: Elbow Anatomy -- Physical Examination of the Elbow -- Sports Related Elbow Problems -- Lateral and Medial Epicondylitis -- Medial and Lateral Instability of the Elbow -- Elbow Dislocations -- Common Elbow Fractures -- Different Surgical Techniques in Elbow Fractures -- Nerve Entrapments of Upper Extremity -- Different Treatment Modalities in the Nerve Entrapments of Upper Extremity -- Tricks in Elbow Arthroscopy -- Anatomy and Biomechanics of Wrist and Hand -- Carpal Tunnel Syndrome and Tendon Pathologies of the Wrist -- Carpal Instabilities in Athletes -- Arthroscopic Treatment of Intrinsic Ligament Injuries of the Wrist -- Traumatic Injuries of the Hand & Wrist -- Wrist Arthroscopy -- Elbow Rehabilitation, Different Concept! -- PART IV.Groin Injuries and Hip: Groin Anatomy and Biomechanics -- Common Reasons of Groin Pain in Sports -- Differential Diagnosis in Groin Pain: Perspective From the General Surgeon -- Differential Diagnosis in Groin Pain: Perspective From a Surgeon -- Groin Pain: Neuropathies and Compression Syndromes -- Bone and Joint Problems Related to Groin Pain -- Hip Problems in Athletes and Current Indications for Hip Arthroscopy -- Arthroscopic Treatment of Femoroacetabular Impingement -- Hip Labral Repair and Reconstruction in Athletes -- Anterior Inferior Iliac Spine and Subspine Hip Impingement: Concept, Surgical Technique, and Outcomes -- PART V. Knee Injuries: Complex Functioning of the Knee Joint -- The Neglected Tendon Injuries Around the Knee: A Clinical Alert -- Patellar Tendinosis and Rupture -- Degeneration and Cysts of the Meniscus -- Asymptomatic Meniscal Tears -- Meniscectomy -- Arthroscopic Repair of the Meniscus Tears -- Human Meniscus: From Biology to Tissue Engineering Strategies -- Meniscal Allograft Transplantation -- Meniscal Substitutes: Polyurethane Meniscus Implant - Technique and Results -- Meniscus Reconstruction Using New Collagen Meniscus Implant -- The Role of Biologicals in Meniscus Surgery -- Treatment of Intraarticular Knee Fractures Under Arthroscopic Control -- ACL Registers -- Risk Factors for ACL Injuries Identifiable for Pre-participation Imagiological Analysis -- Prevention of Knee Injuries in Soccer Players -- Prevention Strategies for ACL Injuries -- State of Art in ACL Surgery -- Personalized Treatment Algorithms for ACL Injuries -- Partial ACL Ruptures and Knee Laxity Measurements/Pivot Shift -- ACL Augmentation in Partial Ruptures -- Arthroscopic Repair of Partial ACL Tears: My Viewpoint -- ACL Injuries with Concomittant Meniscal Pathologies -- Different Techniques of ACL Reconstruction: Guidelines -- Primary ACL Repair in Athletes with Mesenchymal Stem Cells and PRP -- Medial Tunnel Placement in ACL Reconstruction and Differences with Transtibial Placement.-ACL Reconstruction with Autologous Quadriceps Tendon -- Biomechanical Variation of Double-Bundle ACL Reconstruction -- The Evalution and Principles of Anatomic Double Tunnel ACL Reconstruction: Why Double Tunnel Anatomic ACL Reconstruction? -- Double Tunnel Anatomic ACL Reconstruction -- Single versus Double ACL Reconstruction in Athletes -- Alternative Techniques For Double Tunnel Anatomic ACL Reconstruction -- ACL Graft Selection and Fixation -- Allografts in ACL Reconstruction -- Costs and Safety of Allografts -- The Role of Growth Factors in ACL Surgery -- Graft Remodelling and Bony Ingrowth After ACL Reconstruction -- Dealing With Complications in ACL Reconstruction -- Arthrofibrosis -- Revision ACL Reconstruction -- ACL Injuries and Surgery - Current Evidence and Modern Development -- Perioperative and Postoperative ACL Rehabilitation Focused on Soft Tissue Grafts -- A Structured Rehabilitation Model with Clinical Outcomes After ACL Reconstruction -- Guidelines to Return to the Field After ACL Reconstruction -- Factors affecting return to Sports after ACL Reconstruction -- Return to Play Decision-Making Following ACL Reconstruction: Multi-Factor Considerations -- PCL Reconstruction: New Concepts -- Current Concepts in the Treatment of PCL injuries -- Combined ACL & PCL Injuries -- Allografts in PCL Reconstructions -- Specialities in Multiple Ligament Injuries -- MCL & ACL Functional Synergy:  The ACL Does Not Function in Isolation -- Medial Side Instability and Reconstruction -- Anteromedial Knee Instabilities -- Reconstruction of the Posterolateral Corner (PLC) of the Knee -- Reconstruction of the Posteromedial Corner (PMC) of the Knee -- Rehabilitation of Complex Knee Injuries and Key Points -- Future Perspectives on Knee Ligament Surgery -- Radiologic Criterias & Demonstration of Patellar Instability -- Non-surgical Treatment of Patellofemoral Pain -- Physiotherapy Tricks in Patellofemoral Pain Syndrome -- Knee Dislocations -- Patellar Dislocations: Overview -- Arthroscopic Patellar Instability Surgery -- MPFL Reconstruction: Current Concepts -- Reconstruction of the MPFL: My Viewpoint -- Malrotation of Femur and Tibia Leading to Patellar Pain and Discomfort -- Computer-assisted Osteotomies for Genu Varum Deformity: Rationale, Surgical Technique, Results and Return to Sportive Activities -- The Role of Osteotomy for Knee Cartilage and Ligament Injuries -- Return to Play After Acute Patellar Dislocation -- Reconstruction of Neglected Tears of the Extensor Apparatus of the Knee -- Proximal Tibiofibular Syndesmotic Disruptions in Sport -- PART VI. Ankle Injuries: Heel Pain in Athletes -- Tendinopathies Around the Foot and Ankle -- Brace Types of the Different Tendon and Ligament Pathologies Around the Foot and Ankle -- Ligamentous Injuries of the Ankle: Sprained Ankle -- Syndesmosis Injuries -- Distal Tibiofibular Syndesmotic Disruption: Missed Injury -- Anterior Ankle Impingement -- Chronic Ankle Instability -- Arthroscopy of the Ankle: New Approaches -- Arthroscopic Assisted Bostrom-Gould Repair -- Osteochondral Injuries of Talus -- Treatment of Osteochondral Talus Defects by Biodegredable Scaffolds -- Arthrosurface in Talus Osteochondral Lesions -- The Natural Course of the Ankle Injury: Based on Volleyball Experience -- Proprioceptive and Functional Exercises After Ankle Surgery -- PART VII.

Cartilage Pathologies: Cartilage Biology -- Epidemiology of Cartilage Injuries -- Surgical Treatment of Osteochondral Defects With Mosaicplasty Technique -- Surgical Treatment of Osteochondral Defects in the Knee with PVA-H Hydrogel Implants -- Arthroscopic Autologous Chondrocyte Implantation for the Treatment of Chondral Defects -- Second Generation Autologous Chondrocyte Implantation: What to Expect -- Second and Third Generation Cartilage Transplantation -- Next Generation Cartilage Solutions -- Scaffold-free Tissue Engineered Construct (TEC) Derived From Synovial Mesenchymal Stem Cells -- PRP in the Treatment of Cartilage Defects and Early Osteoarthritis of the Knee -- Scaffold-free Endogenous Healing of the Articular Cartilage Lesion -- Adipose Tissue and Progenitor Cells for Cartilage Formation -- Rehabilitation after Knee Cartilage Transplantation with Autologous Chondrocytes or Stem Cells -- PART VIII. Stress Fractures: Stress Fractures: Overview -- Imaging of Stress Fractures and Involved Risk of Ionizing Radiation -- Jones Fracture -- Tarsal and Navicular Stress Fractures -- Sesamoid Stress Fractures -- Stress Fractures Around Hip -- PART IX. Muscle and Tendon Injuries: Tendon and Ligament Pathophysiology - Healing after Injuries -- Muscle Pathophysiology - Healing of Muscle Injuries -- Prevention of Muscle Injuries in Sports -- Muscle Injuries: Strains, Contusions and Ruptures -- Hamstring Injuries: Types, Rehabilitation and Prevention -- Lower Extremity Muscle Injuries in Professional Football Players: Overwiev -- When and How We Can Use PRP i.