RT Book, Section
A1 Podeszwa, David A.
A2 Rudolph, Colin D.
A2 Rudolph, Abraham M.
A2 Lister, George E.
A2 First, Lewis R.
A2 Gershon, Anne A.
SR Print(0)
ID 7020550
T1 Chapter 215. Developmental Dysplasia of the Hip
T2 Rudolph's Pediatrics, 22e
YR 2011
FD 2011
PB The McGraw-Hill Companies
PP New York, NY
SN 978-0-07-149723-7
LK accesspediatrics.mhmedical.com/content.aspx?aid=7020550
RD 2024/10/11
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.