This comprehensive textbook, published in collaboration with ESSKA, now in a revised and updated second edition, covers all major shoulder problems and related arthroscopic treatments. Introductory sections on basic science and the principles of shoulder arthroscopy provide essential information with the aim of enhancing understanding of a wide range of key issues. Shoulder conditions and their treatments are then described according to a learning pathway that will allow readers to improve their knowledge and skills in shoulder arthroscopy, from simple, standardized techniques to more complex and advanced procedures.  The new edition includes additional chapters and offers attractive recent surgical solutions to challenging shoulder conditions, such as severe bone loss in shoulder instability and massive and irreparable rotator cuff tears. All chapters are written by expert arthroscopic surgeons who present decision-making algorithms for diagnosis and treatment, provide step-by-step instructions on arthroscopic techniques, identify pitfalls, and describe their personal tips and pearls. A dedicated section on outcomes measurements and experimental models explains the principles of outcome research on the topics addressed in the book.