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1. Introduction 1.1. History of Obesity and Metabolic Surgery. 1.2. Conservative Treatment of Overweight and Obesity 1.3. Problems of Obesity Treatment by Children 1.4. Obesity and modern Nutrition 1.5. Physical activity as a significant factor in the therapy of obesity in adults 1.6. The Role of adipokines and gastrointestinal tract hormones in obesity 1.7. Multidisciplinary Cooperation Advantages in the Future of Metabolic Sugery - Diabe-tologist View 1.8. Hyperlipidemia the field of interdisciplinary medical activity 1.9. The Borders of Internal Medicine and Metabolic Surgery 1.10. Reality of Metabolic Surgery - an innovative approach to the treatment of the metabolic syndrome 1.11. Venous thromboembolism - prophylaxis and treatment in Metabolic Surgery 1.12. Principals of Nutrition after Bariatric Surgery 2. Preoperative Evaluation and Indications for Surgery 2.1. Psychological and Psychiatric Contraindications for Bariatric Surgery 2.2. Anesthesia Challenges by Bariatric Surgery 2.3. Patient Selection and Choosing the Bariatric Surgical Procedure 3. Surgical Procedures 3.1.1. Pathophysiology of Restrictive Procedures 3.1.2. Gastric Banding 3.1.3. Sleeve Gastrectomy 3.2.1. The Conventional Gastric Bypass 3.2.2. The Banded Gastric Bypass 3.3.1. The Pathophysiology of Malabsorptive Bariatric Procedures 3.3.2. The Biliopankreatic Diversion 4. Accessory Medical Problems after Metabolic Surgery 4.1. Postoperative management after Metabolic Surgery 4.2. Modern CT and MRT application in Metabolic Surgery 4.3. Laboratory tests after Bariatric surgery to diagnose nutritional deficiencies 4.4. Life quality tests after Bariatric Surgery 4.5. Pregnancy after Bariatric Surgery 5. Secondary and Redo Operations 5.1. Bariatric Redo-Surgery 5.2. Plastic Surgery after Massive Weight Loss 5.3. Herniations after Bariatric Surgery 5.4. Chronic venous insufficiency and venous ulcers in the obese 6. Perspectives of Metabolic Surgery.