Anatomical Factors Which Influence the Formation of Peroneal Tendon Tears: A Retrospective Comparative Study.

This study aims to investigate the anatomical factors that are effective in the formation of peroneal tendon tears comparing with the control group. The patients with ankle magnetic resonance imaging (MRI) due to pain on the lateral side of the ankle were retrospectively analyzed using the clinical archive between July 2015 and January 2020. Peroneal tendon tears, peroneal tubercle type and size, presence of peroneal quartus, presence and type of retromalleolar groove, retromalleolar groove area, lateral malleolus type, presence of os peroneum, peroneus brevis-lateral malleolus distance (PBLMD), and accompanying pathologies in coronal, axial, and sagittal planes MRI were evaluated. PBLMD was measured as 27.1 ± 12.3 mm in Group 1. With PBLMD, it was measured as 39.6 ± 11.68 mm in Group 2. There was a significant relationship between low-lying peroneus brevis muscle and peroneal tear (p < .001). Peroneal tendon tear was more common in patients with peroneal quartus muscle (p < .001). There was a relationship between the retromalleolar groove type and the presence of peroneal tear (p = .004). More peroneal tears were observed in the concave retromalleolar groove type. The presence of concave type retromalleolar groove, peroneus quartus, and low-lying peroneus brevis muscle was found to be associated with peroneal tendon tears.