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Congenital calcaneonavicular coalition

Case contributed by Ammar Haouimi
Diagnosis almost certain

Presentation

Chronic pain of the left foot.

Patient Data

Age: 10 years
Gender: Male

There is a tubular elongation of the anterior calcaneal process "anteater nose sign" with irregularity of the calcaneonavicular joint surfaces as well as bone marrow and soft tissue edema (secondary stress reaction) with associated joint effusion.

Case Discussion

MRI features of an incomplete calcaneonavicular coalition which is considered with the talocalcaneal, the two most commons subtypes of tarsal coalitions.

 

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