Genu valgum in children with coxa vara resulting from hip disease. Operative correction of coxa vara acutely moves the mechanical axis farther laterally, causing the occult genu valgum to become clinically apparent.
what causes COXA Vara?
The most common cause of coxa vara is either congenital or developmental. Other common causes include metabolic bone diseases (e.g. Paget’s disease of bone), post-Perthes deformity, osteomyelitis, and post traumatic (due to improper healing of a fracture between the greater and lesser trochanter).
how is Genu Valgum measured?
Draw a line connecting the center of the knee to the center of the ankle. 5. Measure the angle between the 2 lines. A measurement of 0°/180° implies no deformity; otherwise, the observed angle is the angle of varus or valgus present (valgus if foot is lateral, varus if foot is medial).
what is COXA Vara and Valga?
Coxa valga is defined as the femoral neck shaft angle being greater than 139 ° Coxa vara is as a varus deformity of the femoral neck. It is defined as the angle between the neck and shaft of the femur being less than 110 – 120 ° (which is normally between 135 ° – 145 °) in children.
How do you know if you have COXA Vara?
Coxa vara usually presents with a limp, a leg length difference, and limited ability to bring the thigh out to the side. X-rays are used to diagnose coxa vara. Depending on what caused the condition and how severe the deformity, reconstructive surgery may be needed to improve the hip alignment and biomechanics.
What is Perthes disease?
Perthes disease is a rare childhood condition that affects the hip. It occurs when the blood supply to the rounded head of the femur (thighbone) is temporarily disrupted. Without an adequate blood supply, the bone cells die, a process called avascular necrosis. You may also read, Does Coxsackie virus go away?
What is a femoral anteversion?
Femoral anteversion is an inward twisting of the thigh bone, also known as the femur (the bone that is located between the hip and the knee). Femoral anteversion causes the child’s knees and feet to turn inward, or have what is also known as a “pigeon-toed” appearance. Check the answer of Does CPT code 69209 need a modifier?
What is COXA Plana?
Coxa plana is a disease of the previously normal hip joint in which the bony nucleus of the femoral head becomes necrotic. The dead bone is gradually replaced by the usual stages of bone repair. During this process there is usually some flattening of the normally spherical femoral head.
What is femoral derotation osteotomy?
Femoral derotational osteotomies are performed to correct residual symptomatic increased femoral torsion in adolescents and adults. Typical indications are anterior knee pain caused by patellar maltracking and patellofemoral instability. Read: Does CPT code 76942 need a modifier?
What is COXA Breva?
coxa breva: short femoral neck with a small femoral head caused by premature closure of the epiphysis. coxa magna: enlarged femoral head. coxa plana: flat femoral head (osteochondrosis) of the capitular epiphysis of the femur; also called Legg-Perthes d.
What is the angle of anteversion?
Femoral anteversion refers to the orientation of the femoral neck in relation to the femoral condyles at the level of the knee. Femoral anteversion averages between 30-40° at birth, and between 8-14° in adults 1, with males having a slightly less femoral anteversion than females 2.
What is angle of torsion?
Definition of angle of torsion. : the angle through which a radial section of a body (as a wire or a shaft) deflects from its normal position when the body is subjected to torque.
What does Genu Varum mean?
Genu varum (also called bow-leggedness, bandiness, bandy-leg, and tibia vara), is a varus deformity marked by (outward) bowing at the knee, which means that the lower leg is angled inward (medially) in relation to the thigh’s axis, giving the limb overall the appearance of an archer’s bow.
What lever is the hip joint?
The hip joint is a third class lever. It cannot produce the same load force to effort ratio as a second class lever.
Can genu Valgum be corrected?
When genu valgum is severe, or when exercise isn’t enough to relieve pain and stabilize your knee, your doctor may recommend surgery. This minor procedure is called guided growth surgery. The plate is removed when bone growth is corrected. Adults may benefit from an osteotomy.