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Collaborative Hypertext of Radiology

Musculoskeletal system



developmental dysplasia of the hip

aka: congenital hip dislocation (CDH or CHD)

  • females (80-90%), 2/3 are firstborn
  • white > blacks
  • associated:
    • breech delivery (6x cephalic),C-section, torticolis, family history

  • due to ligamentous laxity from increased circulating maternal estrogen, not acetabular dysplasia
  • unilateral LEFT (70%); bilateral in only 5%

  • Putti's triad
    1. supero-lateral migration of femoral head
    2. increased acetabular angle
    3. small capital femoral epiphysis

see: hip disease

Charles E. Kahn, Jr., MD  -  2 February 1995
Last updated:  1 October 2013


Related CHORUS documents:
hip disease
Legg-Calve-Perthes disease
hip dislocation
slipped capital femoral epiphysis (SCFE)
coxa plana
avascular necrosis (AVN)


Copyright © 2013, Charles E. Kahn, Jr.