Though the subject of fractures of the calcaneus has been extensively covered (1, 5, 11, 12, 13, 14, 17, 20, 21), our attention has been directed, within the past few months, to a simple calcaneal fracture which to our knowledge has received slight attention in the literature, yet is important clinically and from the medicolegal aspect. Only a few writers (2, 7, 8) have reported small series of cases briefly describing the anatomy and mechanism of this fracture. The portion of the calcaneus involved appears never to have been given a specific anatomical name, though it rightly deserves one. Textbooks of anatomy (6, 10, 19) describe the calcaneus (os calcis) as having on the anterior surface a saddle-shaped facet which articulates with the cuboid bone. On the medial surface at the anterior superior margin is a facet known as the anterior articular surface, which articulates with the anterior calcaneal facet of the talus. Yet the entire anterior superior margin of the calcaneus, especially as seen on the la...