Poetry -- Preface -- 1. Introduction - From a disabling condition to a variant of normalcy -- 2. Epidemiology of an underdiagnosed syndrome -- 3. Causes of the extra chromosome/s -- 4. Different karyotypes, same disease? -- 5. Genetic and epigenetic aspects of the supernumerary X chromosome -- 6. Prenatal Counselling and management in the early neonatal period -- 7. Early developmental pathways and communication good practices -- 8. The diagnosis at prepubertal age -- 9. What to do and when from infancy to puberty -- 10. Neuropsychiatric aspects -- 11. Testicular development -- 12. The Klinefelter puberty -- 13. Genetic of Gametes -- 14. Phenotype of the adulthood -- 15. Hypothalamic-Pituitary Axis Function -- 16. The altered bone -- 17. Obesity, the rule or not -- 18. Lipids and glucose metabolism -- 19. Cardiovascular characteristics -- 20. The Thyroid Function -- 21. Oncological problems -- 22. Fertility preservation -- 23. Fertility vs Infertility -- 24. Psychological features -- 25. Sexual function -- 26. Testosterone treatment in male patients with Klinefelter's syndrome.

This book presents the latest insights into all the critical aspects of Klinefelter's Syndrome, in order to promote a more homogeneous a medical approach to this condition, leading to better and more "evidence-based" support, and improving patient satisfaction. It offers physicians and all health professionals involved in treating these patients (andrologists, pediatricians, endocrinologists, psychologists) a comprehensive overview and a useful tool for their daily clinical practice.