Congenital vertical talus (CVT) is a rare condition in which the talus (heel bone) and navicular bones (ankle bone) of the child’s feet are abnormally positioned. This leads to a rigid flat foot with a rocker-bottom appearance. The hindfoot points downward to the floor while the forefoot points upwards. It occurs most frequently with other neuromuscular disorders such as spina bifida and arthrogryposis (multiple joint contractures present at birth).