Adult Acquired Flatfoot A variety of foot problems can lead to adult acquired flatfoot deformity (AAFD), a condition that results in a fallen arch with the foot pointed outward. Most people — no matter what the cause of their flatfoot — can be helped . The adult acquired flatfoot is a progressive, symptomatic (painful) deformity resulting from gradual stretch (attenuation) of the tibialis posterior tendon as well as the ligaments that support the arch of the foot. Most flat feet are not painful, particularly those flat feet seen in children.
Adult acquired flatfoot is a very common condition that affects the feet and ankles of adult males and females. In people with adult acquired flatfoot, the arch of the foot falls or collapses. It can be a painful, sometimes debilitating condition. Adult acquired flatfoot deformity (AAFD) is a progressive flattening of the arch of the foot that occurs as the posterior tibial tendon wears down. It has many other names such as posterior tibial tendon dysfunction, posterior tibial tendon insufficiency, and dorsolateral peritalar subluxation.