Authors of section

Executive editor

Michael Baumgaertner


Michael Huo, Michael Leslie, Iain McFadyen

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Lateral/medial femoral epicondyle fracture

General considerations

Isolated medial or lateral epicondyle fractures are rare. They usually form part of a more complex fracture around the femoral component.

These fractures are classified by UCPF as V.3-A.

Isolated medial or lateral epicondyle fracture


Isolated epicondyle fractures are usually caused by avulsion injury to collateral ligaments.

Avulsion injury to collateral ligaments

Clinical signs

  • Knee instability
  • Pain
  • Swollen


Plain X-rays remain the first line of investigation.

CT Scan is useful to assess possible fracture extension to the implant interface.

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