Anatomic and Biomechanical Considerations of Flatfoot Deformity The Role of Equinus in Flatfoot Deformity Single and Double Osteotomies of the Calcaneus for the Treatment of Posterior Tibial Tendon Dysfunction Addressing Medial Column Instability in Flatfoot Deformity Naviculocuneiform Arthrodesis for Treatment of Adult-Acquired Flatfoot Deformity Ligament Insufficiency with Flatfoot: Spring Ligament and Deltoid Ligament Double versus Triple Arthrodesis for Flatfoot Deformity: When, Why, and How? Ankle Joint Salvage for Rigid Flatfoot Deformity Approach to the Ankle in Adult Acquired Flatfoot Deformity Surgical Considerations for Revision Flatfoot Reconstruction: Overcorrection/Undercorrection An Update on Pediatric Flatfoot