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Medial Epicondylar Epiphyseal (MEE) Angle

Summary:

  • The medial epicondylar epiphyseal (MEE) angle is one of several radiographic angles used when reading an AP view of the elbow to evaluate for the presence of a supracondylar fracture. 
  • The MEE is formed by drawing a straight line down through the middle of the humeral shaft and then a line along the medial epicondylar growth plate. 
  • The angle between the humeral shaft line and the epicondylar growth plate line should be between 34 to 42 degrees after a reduction of a fracture.

Medial Epicondylar Epiphyseal (MEE) Angle

    How to Measure

    While looking an AP view of an elbow radiograph (x-ray), the medial epicondylar epiphyseal (MEE) angle is measured by:  

    • Drawing a straight line down through the middle of the humeral shaft and then a line along the medial epicondylar growth plate.
    Clinical Relavance
    • The angle between the humeral shaft line and the epicondylar growth plate line should be between 34 to 42 degrees after a reduction of a fracture. 
    • This angle may not be accurate in pediatric patients < 3 years of age since they have a more rounded medial humeral metaphysis.
    Related Conent

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    References
      1. Biyani A, et al: Determination of medial epicondylar epiphyseal angle for supracondylar humeral fractures in children. J Pediatr Orthop 1993;13:94-97.
      Editors & Reviewers

      Last Updated:  June 2015

    Editors:  Anthony J. Busti, MD, PharmD, FNLA, FAHA