- The Calcaneofibular ligament is a small lateral ankle ligament that is often torn.
- Its normal MRI appearance is a thin low signal structure (Pink arrows) that extends from the calcaneum to the fibula and passes deep to the peroneal tendons (Green arrows).
The Calcaneofibular ligament is a small lateral ankle ligament that is often torn.
Here is what to look for when assessing for an acute tear of the Calcaneofibular ligament on MRI.
- Thickened, hyper-intense and ill defined calcaneofibular ligament (Pink arrows).
- This can involve the entire ligament or a portion of it.
- The anatomical landmark to find the CFL are the Peroneal tendons (Blue arrows) with the CFL lying deep to it between the peroneal tendons and calcaneum.
The normal MRI appearance of the Calcaneofibular ligament is a thin low signal structure that extends from the calcaneum to the fibula and passes deep to the peroneal tendons.
An acute high-grade tear of the Calcaneofibular ligament appears as thickening, hyper-intensity, and ill definition of the ligament.
The Peroneal tendons on an MRI can serve as an anatomical landmark to locate the Calcaneofibular ligament.
A normal Calcaneofibular ligament appears as a thin low signal structure on an MRI.
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