This is especially true in cases where the hip anteversion is combined with a separate rotational bone deformity, such as external tibial torsion – an outward rotation of the tibia (shinbone). However, in certain cases, femoral anteversion can be difficult to detect. The physician may also order X-rays or a CT scan to look for any deformity. Generally, the doctor will review the patient’s history, do a physical examination and observe the patient’s gait (manner of walking) to look for signs of in-toeing. ![]() Snapping sound in the hip while walking.Keeping the legs in this position often helps a patient maintain balance In-toeing, in which a person walks “pigeon-toed,” with each foot pointed slightly toward the other. ![]() Signs and symptoms of femoral anteversion include: After a femur fracture, a torsional malunion can occur leading to the same type of problems mentioned above. This type of torsional deformity can also occur after trauma. Since it often runs in families, it is believed that some people are genetically predisposed to the condition. It appears to be related to the position of the baby while growing in the uterus. The exact cause is unknown, however, femoral anteversion is congenital (present since birth) and develops while a child is in the womb. This position keeps the femoral head within the socket, which minimizes pain. Right: Most patients with excessive hip anteversion compensate by walking in-toed. In this position, the femoral head subluxes out of the front of the hip joint. Left: Position of an anteverted femoral head with the foot facing straight forward. This torsional mal-alignment places abnormal stress on both the hip and knee joints often leading to pain and abnormal joint wear. When the foot is positioned facing directly forward, the femoral head may sublux (partially dislocate) from the socket of the hip joint, called the acetabulum. ![]() In people who do not grow out of it, a mildly anteverted femoral head may cause no significant health problems.Īn excessive anteversion of the femur, however, may overload the anterior (front) structures of the hip joint, including the labrum and joint capsule. Many children are born with femoral anteversions that they eventually grow out of. Said differently, the knee is excessively twisted inward relative to the hip. What is Femoral Anteversion?Īlso called hip anteversion, femoral anteversion refers to a forward (inward) rotation in the femur (thigh bone and knee) which connects to the pelvis to form the hip joint. Anteversion refers to an abnormal forward rotation. In anatomy, the word “version” refers to the angle or rotation of all or part of an organ, bone or other structure in the body, relative to other structures in the body.
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