A 60-years old male patient with lateral pain on the right ankle. No trauma history. With palpation there is a tenderness and swelling posterolateral over the peroneal tendon.

Picture 1: MRI image (at level of ankle joint)

Picture 2: MRI image (proximal image).

Picture 3: MRI image (middle image).

Picture 4: MRI image (distal image: at level of ankle joint = picture 1).

The three MRI images are from proximal to distal. Image 2 shows flattening of the peroneus brevis tendon and image 3 shows a longitudinal split tear of the peroneus brevis tendon.

Picture 5: This MRI image is located more distal and shows a degenerative enlarged peroneus brevis tendon.