What is the radiographic hallmark of skewfoot?

What is the radiographic hallmark of skewfoot?

• A. Lateral subluxation of navicular on talar head
• B. Medial collapse of first ray
• C. Calcaneal valgus deformity
• D. Uniform arch height

Answer: (A)

Lateral subluxation of the navicular on the talar head is the radiographic hallmark of skewfoot. In this complex three‑dimensional deformity, the navicular loses its normal alignment with the talus and shifts laterally at the talonavicular joint, which is best seen on an AP view as the navicular moved off or away from the talar head. This navicular displacement reflects the midfoot instability and forefoot abduction with hindfoot involvement that define skewfoot. Medial collapse of the first ray describes medial column flattening seen in other flatfoot patterns, not the characteristic lateral Navicular shift. Calcaneal valgus addresses hindfoot alignment without describing the talonavicular subluxation, and a uniform arch height would imply a normal arch rather than skewfoot’s complex malalignment.

Lateral subluxation of the navicular on the talar head is the radiographic hallmark of skewfoot. In this complex three‑dimensional deformity, the navicular loses its normal alignment with the talus and shifts laterally at the talonavicular joint, which is best seen on an AP view as the navicular moved off or away from the talar head. This navicular displacement reflects the midfoot instability and forefoot abduction with hindfoot involvement that define skewfoot.

Medial collapse of the first ray describes medial column flattening seen in other flatfoot patterns, not the characteristic lateral Navicular shift. Calcaneal valgus addresses hindfoot alignment without describing the talonavicular subluxation, and a uniform arch height would imply a normal arch rather than skewfoot’s complex malalignment.