Developmental dysplasia of hip

Background

• D/t abnormal relationship of fem head to acetabulum, usu in o/w healthy infants prior to or shortly after birth
• <2% incidence
• 4-6X more common in girls

Differential Diagnosis

Pediatric limp

Hip Related

• Acute rheumatic fever
• Developmental dysplasia of hip
• Femur fracture
• Juvenile idiopathic arthritis
• Legg-Calve-Perthes disease
• Septic arthritis of the hip (peds)
  • Lyme disease arthritis
• Slipped capital femoral epiphysis
• Transient (toxic) synovitis
• Osteosarcoma

Other Causes of Limping

• Developmental dysplasia
• Fracture
  • Toddler's fracture
  • Tillaux fracture, adolescent
• Neoplasm:
  • Leukemia
  • Ewings
  • Osteogenic sarcoma
  • Metastatic neuroblastoma
• Osteomyelitis
• Myositis
• Other:
  • Appendicitis
  • Meningitis
  • Epidural abscess (spinal)

Diagnosis

Early: see asymm soft tissue folds in groin, buttock & thigh, limb may be pulled prox & short

Ortolani on ALL young inf in ED, flex hip & knee @ 90 degrees & the thigh is abducted, the lateral aspect of both thighs should touch the table, the dislocated side will be restricted & have "click" as head slips out of acetabulum

• by 6 wk <30% will have + ortolani or bartlow

<3mo: Utz hip

>3mo: AP pelvis with both legs extended in neutral abduction

• Shenton's line
• Acetabular angle should be <30'

Management

• Refer ALL pts to pediatric orthopedist
• 0-6 mo Pavlik harness or spica
• Older=ORIF

See Also

• Pediatric hip pain