Medial epicondyle avulsion

Case contributed by Dr Andrew Dixon

Presentation

This young boy dislocated his elbow whilst playing football. The elbow was relocated prior to imaging.

Patient Data

Age: 12 years
Gender: Male
Modality: X-ray

There is fracture / avulsion of the internal (medial) epicondyle ossification centre which is absent from it's normal position. It is displaced inferiorly and located just medial to the coronoid. 

Modality: Annotated image

The avulsed and displaced medial epicondyle (M) is marked in red, whereas the normal centers of ossification are marked in white. Note that as the lateral (external) epicondyle is present (L) a medial epicondyle should be easily seen. Knowing this it is then easy to not mistake the displaced fragment for the trochlear centre (T) which is also visible. 

Case Discussion

This case highlights the importance of CRITOE, one of the few mnemonics which are crucial to know as it enables you to remember the order of appearance of the elbow ossification centres. 

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Case Information

rID: 9450
Case created: 20th Apr 2010
Last edited: 19th Jan 2017
Inclusion in quiz mode: Included

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