Authors of section


Cassio Ferrigno

Executive Editor

Amy Kapatkin

General Editor

Noel Moens

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42-B3 Diaphyseal fracture with nonreconstructible wedges

42-B3 fractures

42-B3 are diaphyseal fractures with one or more non-reconstructible wedges.


Radiographs of a 6-year-old domestic shorthair cat who sustained an unknown trauma. The radiographs show a 42-B3 fracture of the proximal diaphysis.



42-B type fractures are typically caused by a combination of bending and compression forces.

They may occur after a fall from height, being kicked or following blunt trauma. Depending on the amount of energy causing the fracture, there may be more or less comminution.

Clinical signs

Clinical signs observed in 42-B fractures are:

  • Swelling of the region
  • Abnormal movement in the tibia shaft
  • Pain
  • Non weight bearing on the limb


Craniocaudal and lateral radiographic views are needed.