Coxa valga describes a deformity of the hip where there is increased angle between the femoral neck and femoral shaft.
Coxa valga is often associated with shallow acetabular angles and femoral head subluxation.
- trauma causing growth plate arrest
Coxa valga occurs where the angle formed between the neck of the femur and its shaft (also known as the caput-collum-diaphyseal (CCD) angle or the femoral angle of inclination) is increased beyond >140 degrees. Normal is between 125-135 degrees in adults, but can be 20-25 degrees greater at birth and 10 degrees greater in children. When the angle is <120 degrees, this is considered coxa vara.
Femoral anteversion and rotation can affect measurement accuracy and should be considered when measuring angles.
Treatment and prognosis
Coxa valga can be associated with genu varum and lead to increased stress and early degenerative changes in the medial compartment of the knee.
Coxa valga can be treated with varus derotation osteotomy (VDRO) and angled blade-plate fixation 2.
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- 2. Daldrup-Link HE, Gooding CA. Essentials of Pediatric Radiology. Cambridge University Press. (2010) ISBN:0521515211. Read it at Google Books - Find it at Amazon
- 3. Morrell DS, Pearson JM, Sauser DD. Progressive bone and joint abnormalities of the spine and lower extremities in cerebral palsy. Radiographics. 2002;22 (2): 257-68. doi:10.1148/radiographics.22.2.g02mr19257 - Pubmed citation