The Chopart joint, also known as the midtarsal or transverse tarsal joint, consists of the calcaneocuboid and talonavicular joints. These two joints lie in a plane perpendicular to the longitudinal arch of the foot, and act as a single unit with respect to the hindfoot. The Lisfranc joint consists of the tarsometatarsal joint complex, which includes the medial, middle, and lateral cuneiforms; the cuboid; and the articulations with the five metatarsal bases. The navicular cuneiform articulations, and the articulation between the navicular and cuboid bones, do not specifically have their own eponym. The Lisfranc joint forms the osseous and ligamentous foundation of the longitudinal and transverse arches (Fig. 1).