Review ArticleDevelopmental Dysplasia of the Hip in Adolescents and Young AdultsSchmitz, Matthew R. MD; Murtha, Andrew S. MD; Clohisy, John C. MD; The ANCHOR Study GroupAuthor Information From the Department of Orthopaedics, San Antonio Military Medical Center, San Antonio, TX (Dr. Schmitz and Dr. Murtha), and the Department of Orthopaedics, Washington University in St. Louis, St. Louis, MO (Dr. Clohisy). Dr. Schmitz or an immediate family member has stock or stock options held in HitCheck and serves as a board member, owner, officer, or committee member of AAOS and American Academy of Pediatrics—Section on Orthopaedics, Pediatric Orthopaedic Society of North America, Pediatric Research in Sports Medicine, and Society of Military Orthopaedic Surgeons. Dr. Clohisy or an immediate family member has received IP royalties from MicroPort; serves as a paid consultant to MicroPort Orthopedics, Inc. and Zimmer Biomet; and has received research or institutional support from Zimmer Biomet. Neither Dr. Murtha nor any immediate family member has received anything of value from or has stock or stock options held in a commercial company or institution related directly or indirectly to the subject of this article. The ANCHOR Study Group Members are listed in Appendix 1. Journal of the American Academy of Orthopaedic Surgeons: February 1, 2020 - Volume 28 - Issue 3 - p 91-101 doi: 10.5435/JAAOS-D-18-00533 Take the CME Test Metrics Abstract Developmental dysplasia of the hip (DDH) in adolescents and young adults can cause notable pain and dysfunction and is a leading cause of progressive hip osteoarthritis in affected patients. Recognition of the clinical symptoms and radiographic presentation of DDH in adolescents and young adults are paramount for early management. Plain radiographs are critical for making proper diagnosis, whereas three-dimensional imaging including MRI and/or CT detects intra-articular pathology and better characterizes hip morphology. Management of early, symptomatic DDH includes nonsurgical modalities and open joint preservation techniques. Arthroscopic management can be used as an adjunct for symptomatic treatment and for addressing intra-articular pathology, but it alone does not correct the underlying osseous dysplasia and associated instability. The periacetabular osteotomy has become the mainstay of efforts to redirect the acetabulum and preserve the articular integrity of the hip; however, the proximal femur is also a potential source of pathology that should be considered. Open hip procedures are technically demanding yet provide the opportunity for pain relief, improved function, and preservation of the hip joint. Copyright 2019 by the American Academy of Orthopaedic Surgeons.