This issue of Foot and Ankle Clinics, guest edited by Dr. Cesar de Cesar Netto, will discuss Controversies in managing the flatfoot deformity. This issue is one of four selected each year by long-time series Consulting Editor, Dr. Mark Myerson. Topics in this issue will include: What are the updates on epidemiology, Is advanced imaging a must, Tendon transfer vs. Allograft Reconstruction, Calcaneal osteotomies, The importance of the Medial Column, Osteotomies and stabilization, Lateral Column Lengthening, The role of arthroereisis in the adult patient, Management of Muscle and Tendon Balance in the Collapsing Foot, Spring Ligament and Deltoid Instability, Isolated subtalar joint fusion, and complex hindfoot deformity, among others.