Avulsion of the medial epicondyle

Case contributed by Dr Lee-Anne Slater

Presentation

7 year old girl presented post minor trauma unwilling to mover her left elbow.

Patient Data

Age: 7
Gender: Female
X-ray

The capitellum and radial head are demonstrated, as is the start of ossification of the olecranon. However, the medial epicondyle is not demonstrated and it should be present. It has been avulsed. Small elbow joint effusion.

Case Discussion

This radiograph demonstrates the importance of knowing the order of ossification at the elbow joint in children.

The presence of olecranon ossification implies that we should have capitellum, radial head, internal epicondyle and trochlear ossification. However, there is no medial (internal) epicondyle.

The diagnosis of a medial epicondyle avulsion was made and there is a small associated effusion.

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Case information

rID: 13749
Case created: 12th May 2011
Last edited: 3rd Aug 2016
Inclusion in quiz mode: Included

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