Dr Alok Sud, MS, Commonwealth Fellow RHSC, Edinburgh, is Director Professor & Unit Head, Department of Orthopedics, Lady Hardinge Medical College, New Delhi. He is a well-known orthopedic surgeon having more than 25 years of teaching experience. He has published more than 35 papers in national and international journals. He has been a scholar and was selected for the prestigious Commonwealth Scholarship in 2011–12. He is a Section Editor (Pediatric Orthopedics) for the Indian Journal of Orthopedics (IJO) and a Deputy Editor (Pediatric Orthopedics) for Journal of Clinical Orthopedics and Trauma (JCOT). He is also a reviewer for pediatric orthopedics in several national and international journals. Dr Sud is a life member of Delhi Orthopedic Association, Indian Orthopedic Association, Indian Society for Surgery of Hand, ASAMI, and Fellow of International College of Surgeons. His vast experience as a teacher, clinician, and examiner has helped shape this book which is indispensable for any student of orthopedics.