Supracondylar Femur Fractures Workup

Updated: Oct 13, 2017
  • Author: Steven I Rabin, MD; Chief Editor: Jeffrey D Thomson, MD  more...
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Imaging Studies

Patients with supracondylar femur fractures require anteroposterior (AP) and lateral radiographs of the entire femur to assess associated fractures and deformity; however, views centered at the knee are also important to assess the specific fracture pattern.



No specific staging system has been developed for supracondylar femur fractures; however, the Arbeitsgemeinschaft für Osteosynthesefragen (AO)-Association for the Study of Internal Fixation (ASIF) and Orthopaedic Trauma Association (OTA) classification systems help the surgeon determine appropriate treatment options.

The AO-ASIF classification divides supracondylar femur fractures into three main types, as follows:

  • A - Extra-articular
  • B - Partial articular
  • C - Complete articular

Type A is further divided into the following three subtypes:

  • A1 - Simple
  • A2 - Metaphyseal, wedge
  • A3 - Metaphyseal, complex

Type B is further divided into the following three subtypes:

  • B1 - Lateral condyle (sagittal fracture line)
  • B2 - Medial condyle (sagittal fracture line)
  • B3 - Frontal (coronal fracture line)

Type C is further divided into the following three subtypes:

  • C1 - Articular and metaphyseal segments, simple fractures
  • C2 - Articular simple, but metaphyseal multifragmentary fractures
  • C3 - Articular and metaphyseal segments, multifragmentary fractures