Medial and plantar deviation of one or both feet
(pes adductus, equinovarus, supinatus) can be diagnosed by ultrasound in
utero. Postnatally, radiographic evaluation requires weight-bearing or
simulated weight-bearing anteroposterior and lateral radiographs of the
foot. The talus deformity consists of hypoplasia with plantar and medial
deviation of the shortened talar neck with lateral rotation in the ankle
mortice. Radiographs show medial subluxation of the navicular bone, which
articulates with the medial aspect of the talus neck. Medial subluxation of
the cuboid bone on the calcaneus head results in medial midfoot
displacement. Additional findings include shortening and contractures of
ligaments and joint capsules around the ankle mortice, and contracted and
hypoplastic calf muscles.