American Registry of Radiologic Technologists (ARRT) Practice Exam

In congenital clubfoot, the anatomical structure that is typically deformed is the talus. This condition, also known as talipes equinovarus, primarily involves the foot and ankle, where the foot is twisted out of shape or position. In clubfoot, the talus does not develop normally, which results in the characteristic positioning of the foot that is plantarflexed, inverted, and adducted.

The talus plays a crucial role in the ankle joint's movement, and its abnormal development contributes significantly to the foot's misalignment. Corrective treatment often focuses on realigning the talus and restoring function to the foot.

While other bones such as the femur, tibia, and fibula are involved in the overall structure of the leg and foot, their deformities are not as directly correlated with the classic presentation of congenital clubfoot as the talus is. Understanding the central role of the talus in this condition emphasizes why its deformation is essential in diagnosing and treating clubfoot.