Tronzo classification of trochanteric fractures

Case contributed by Leonardo Lustosa
Diagnosis not applicable

Illustrations of the Tronzo classification of trochanteric fractures (2023 version).

Illustrations of the Tronzo classification of trochanteric fractures.

Case Discussion

Tronzo classification is used to classify intertrochanteric fractures:

  • type I: incomplete fracture
  • type II: no posteromedial comminution, lesser trochanter may be fractured
  • type III: posteromedial comminution, the shaft is medially displaced with the neck beak impacted into it
  • type III variant: type III combined with greater trochanter fracture
  • type IV: posteromedial comminution, the shaft is laterally displaced
  • type V: reverse obliquity

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