TY - CHAP M1 - Book, Section TI - Chapter 215. Developmental Dysplasia of the Hip A1 - Podeszwa, David A. A2 - Rudolph, Colin D. A2 - Rudolph, Abraham M. A2 - Lister, George E. A2 - First, Lewis R. A2 - Gershon, Anne A. PY - 2011 T2 - Rudolph's Pediatrics, 22e AB - Developmental dysplasia of the hip (DDH) is a spectrum of disorders of the developing hip. DDH evolves over time and presents in different forms at different ages. DDH may not be detectable at birth, and hence, the preferred term developmental and not congenital. The American Academy of Pediatrics (AAP) defines DDH as a condition in which the femoral head has an abnormal relationship to the acetabulum.1 Dislocation is defined as complete displacement of a joint, with no contact between the original articular surfaces. Subluxation is defined as displacement of a joint with some contact remaining between the articular surfaces. Dysplasia refers to abnormal or deficient development of the acetabulum. A teratologic dislocation is a distinct condition that occurs before birth, is generally nonreducible on physical exam, and causes the hip to be stiff. Teratologic dislocations are frequently associated with neuromuscular conditions, particularly arthrogryposis and myelodysplasia, and treatment depends on the underlying condition. SN - PB - The McGraw-Hill Companies CY - New York, NY Y2 - 2024/10/06 UR - accesspediatrics.mhmedical.com/content.aspx?aid=7020550 ER -