Tarsal coalition - talocalcaneal

Case contributed by Ahmed Abdrabou
Diagnosis certain

Presentation

Chronic ankle pain with limitation of movement and no history of trauma

Patient Data

Age: 25 years old
Gender: Male
This study is a stack
Sagittal
STIR
This study is a stack
Sagittal
T2
This study is a stack
Coronal
T1
This study is a stack
Coronal
T2
This study is a stack
Axial
T2
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Info

At the middle subtaral joint there is broadening of the talar facet and sustentaculum tali with reduced joint space and irregularities of the articular surfaces. Bone marrow edema is detected on STIR images. Also there is talar peak and pes planus deformity.

Diagnosis: talocalcaneal coalition - fibrous type

Annotated image
Coronal
T2
Sagittal
T2
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Info

Features of talocalcaneal coalition including broadening of the middle subtalar joint articular surfaces (red circle), reduced joint space and irregularity of the articular surface with talar peak (orange circle)

Case Discussion

Tarsal coalition is abnormal fibrous/cartilagenous or bony fusion of two or more tarsal bones. Talar peak develops from excessive force on the talus from abnormal talocalcaneal articulation

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