Overview Posterior tibial tendon dysfunction is one of several terms to describe a painful, progressive flatfoot deformity in adults. Other terms include posterior tibial tendon insufficiency and adult acquired flatfoot. The term adult acq…

Overview One in four adults in the U.S. has adult acquired flatfoot deformity, which may begin during childhood or be acquired with age. The foot may be flat all the time or may lose its arch when the person stands. The most common and ser…