Lister’s tubercle (LT) is a palpable bony prominence on the distal radius and is in close proximity to the extensor pollicis longus (EPL) tendon. Despite its clinical relevance, detailed knowledge regarding its morphological variations, anatomical relationships, and developmental aspects remains limited. This study aims to evaluate the morphological variants of LT and its anatomical relationships with EPL using wrist magnetic resonance imaging (MRI), and to propose a novel classification system …