Presentation
Ankle injury 8 weeks ago with ongoing pain.
Patient Data
Anterior inferior tibiofibular ligament is heterogeneous and thickened with loss of the normal fibrillary pattern; minimal hyperemia. Anterior talofibular and calcaneofibular ligaments have a fibrillary pattern and no hyperemia.
Asymmetric widening of the left tibial syndesmosis with a step in alignment between the lateral tibia and lateral talus. No significant left syndesmotic widening between weight-bearing and de-loading.
Case Discussion
This case demonstrates a subacute syndesmotic injury with a partial/healing tear of the anterior inferior tibiofibular ligament on ultrasound. X-rays confirm mild asymmetric syndesmotic widening but no dynamic instability/widening to indicate a "complete" syndesmotic injury involving the interosseous membrane and/or posterior inferior tibiofibular ligament.
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