This book is a reference source containing all the relevant information about Developmental Dysplasia of the Hip (DDH), for people who practice or utilize hip sonography for the early detection and treatment of DDH. It aims at improving the population screening for DDH, thus contributing to the elimination of the disorder and its devastating consequences.

What makes this book different from existing literature is the fact that, apart from the (updated) information about the disorder (including development, pathophysiology, etiology, pathogenesis, risk factors etc.) and a short technical guidance, the reader will find all relevant knowledge to organize training and set up screening.  This includes analysis of the rationale behind universal sonographic screening, a comparative presentation of the sonographic techniques, teaching course structure / management and setting up a screening service, including audit, quality control of the scans etc.

Special chapters about radiological diagnosis, imaging the consequences of non-diagnosis or maltreatment of the disorder, clinical management of DDH cases and shaping the future of hip sonography, are also provided.

The editors of this book, Professor Joseph O'Beirne and Dr Konstantinos Chlapoutakis, are currently serving as the Chair and General Secretary of the International Interdisciplinary Consensus Committee on DDH Evaluation (ICODE), respectively. ICODE is a scientific society formed in 2018 aiming at (a) working towards consensus on the various issues regarding DDH, in particular policies for detection and early treatment, (b) promoting, standardizing and continually improving teaching and training in the Graf's technique of infant hip ultrasound and (c) supporting research, audit and quality improvement in the field of detection and early treatment of DDH.

Professor O'Beirne is a member of the National Implementation Group for Ultrasound screening in the Republic of Ireland, is a member of the Irish and UK faculties for DDH Ultrasound teaching courses and has been an author of a number of publications on DDH.

Dr Chlapoutakis has organized many teaching courses throughout Greece, authored national and international publications about hip sonography, translated hip sonographic books into the Greek language and has been invited as a lecturer in the field, in both national and international congresses (including the ESR 2020 and the BCR 2019).