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
This study is a stack
Sagittal
T1
This study is a stack
Sagittal
T1 fat sat
This study is a stack
Sagittal
PD fat sat
This study is a stack
Coronal PD
fat sat
This study is a stack
Axial PD
fat sat
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Info

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 oedema (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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