Posterior Malleolus Of The Human Tibia, Lateral View

Description

Posterior malleolus of the distal tibia anchors the posterior margin of the tibial plafond and frames the back of the talocrural (ankle) joint. From a lateral perspective, the posterior tibial lip projects inferiorly and slightly posterior to the distal articular surface, forming a buttress behind the ankle mortise while remaining continuous proximally with the tibial shaft. The cortical ridge stands posterior to the lateral aspect of the distal tibia, where the incisura fibularis (fibular notch) lies more anteriorly for articulation with the distal fibula at the tibiofibular syndesmosis. Bone surface detail is the focus. Orthopaedic relevance concentrates here because posterior malleolar fractures, often part of trimalleolar fracture patterns, alter the congruity of the tibial plafond and compromise syndesmotic stability through involvement of the posterior inferior tibiofibular ligament insertion (Volkmann fragment). A lateral view helps you judge the posterior step-off and rim contour that can block talar reduction or contribute to post-traumatic tibiotalar osteoarthritis if left incongruent, and it supports teaching the rationale for posterior-to-anterior screw fixation or a posterolateral approach when the fragment is substantial. Small structure, big consequences. Use this illustration in undergraduate lower limb anatomy teaching to reinforce distal tibial landmarks, or in orthopaedic and radiology publications discussing ankle fracture classification, CT-based fragment morphology, and fixation strategy at the posterior plafond. It also suits patient-facing education materials that need accurate terminology for the posterior malleolus without distracting soft-tissue detail. Anatomical accuracy verified by SciePro's Medical Advisory Board.