There is focal T2 signal abnormality and in a short segment of the peroneus longus tendon as it begins its horizontal traverse in the lateral midfoot. Surrounding edema is present in the paratenon. These abnormalities correspond to the site of the patient's pain. Diagnosis Acute partial tear of the peroneus longus tendon Discussion Tears of the peroneus longus tendon are uncommon. They are more frequently chronic and juxta-malleolar and may coincide with the more common peroneus brevis tears.
Torn tendons have a variety of imaging appearances depending on their location and chronicity.
In any case, treatment will also vary depending on the assessment at physical exam, the imaging findings, and the patient's level of activity. Generally, treatment options include anti-inflammatory medication, immobilization, surgery, and, often later, physical therapy. Khoury NJ, et al. MR imaging evaluation. Tjin A, et al.