This book, comprising the Instructional Course Lectures delivered at the 19th ESSKA Congress in Milan in 2021, provides an excellent update on current scientific and clinical knowledge in the field of orthopaedics and sports traumatology. It addresses a variety of interesting and controversial topics relating to the shoulder, elbow, hip, knee and foot, all of which are highly relevant to orthopaedic surgeons  daily practice. Featuring contributions written by leading experts from around the globe, it enables readers to gain a better understanding of pathologies, which in turn can lead to more individualized treatments for patients. The book is of interest to clinicians and researchers alike.