Fibula Showing The Malleolar Groove, Posterior View

Description

Distal fibula and its lateral malleolus anchor the composition in a posterior perspective, with the malleolar groove (sulcus malleolaris) cut into the posteromedial aspect of the lateral malleolus. Along this concavity, the expected track for the fibularis (peroneus) longus and fibularis brevis tendons lies immediately posterior to the malleolar apex, bounded anteriorly by the fibular cortex and posteriorly by the usual course of the superior fibular (peroneal) retinaculum. Proximal to the groove, the posterior shaft of the fibula narrows and flattens, clarifying how the distal metaphysis broadens to form the ankle mortise laterally. Bony relief is the focus. Malleolar groove anatomy matters whenever lateral ankle pain localizes behind the lateral malleolus, where tenosynovitis, longitudinal split tears of fibularis brevis, or tendon subluxation can follow inversion injury or a shallow sulcus. Orthopaedic and sports medicine readers often need a fixed posterior reference for where the superior fibular retinaculum attaches and why a posterior malleolar fragment or distal fibular fracture pattern can destabilize the peroneal tendons even when the primary complaint sounds like a routine sprain. The posterior viewpoint supports correlation with axial MRI and ultrasound positioning by keeping the tendon channel, malleolar tip, and adjacent posterior fibular surface in one frame. Use this illustration in lower limb anatomy teaching (ankle and foot), MSK radiology modules on peroneal tendon pathology, and operative atlases covering lateral malleolar fixation or retinacular repair where precise tendon tracking over the sulcus guides incision placement. It also fits patient education materials explaining why pain sits just posterior to the lateral malleolus rather than at the anterior talofibular ligament. Anatomical accuracy verified by SciePro's Medical Advisory Board.