Dorsal avulsion fracture of the navicular bone

Case contributed by Dr Hisham Alwakkaa

Presentation

Ankle and foot pain following fall.

Patient Data

Age: 14
Gender: Female

There is a small avulsed fragment at the dorsal aspect of the navicular bone, associated with mild swelling of the overlying soft tissue. 

X-ray

Follow up images after 14 months from the inital injury

On comparison, there is a developing bony connection between the inferior pole of the avulsed fragment and the donor bone consistent with healing (more obvious on enlarged views).

 

Case Discussion

Avulsion fracture of the dorsal aspect of the navicular bone usually associated with talonavicular ligament injury. It is important to differentiate this injury from os supranaviculare which represents a normal variant. To do that; you need to correlate with the clinical complaint and the tenderness location on physical exam. also, as in our case, the associated swelling of the overlying soft tissue, as well as the fact that the aspect of the avulsed fragment facing the navicular bone is not well-corticated support the diagnosis of an avulsion fracture rather than os supranviculare.

 

 

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Case information

rID: 57647
Published: 4th Jan 2018
Last edited: 19th Aug 2019
Inclusion in quiz mode: Included
Institution: Women and children Hospital of Buffalo

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