UMEM Educational Pearls

Question

11 year-old boy presents with right knee pain and swelling after falling off of his bicycle. What's the diagnosis?

Answer

Answer: Fracture of the intercondylar eminence of the tibia; Meyers & McKeever Grade II (grading system described below)

 

Intercondylar Eminence Fracture

  • Avulsion of the insertion of the ACL because the ligament stronger than incompletely ossified bone in children
  • Incidence is 3 in 100,000 children
  • Most common injury mechanism
    • Falls from a bicycle
    • Motor vehicle crash
  • Meyers and McKeever’s classification system
    • I (non-displaced) - Generally treated non-operatively with long-leg casting
    • II (hinged fragment)  - Generally treated like Grade I
    • III (displaced) - Requires surgical fixation

 

 

Reference: Tudisco, C., et al Intercondylar eminence avulsion fracture in children: long-term follow-up of 14 cases at the end of skeletal growth, J Pediatr Orthop B 19:403–408 c 2010

References

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