Items tagged “hip dysplasia”

The acetabular angle is a radiographic measurement used when evaluating potential developmental dysplasia of the hip (DDH).  It is most useful in patients who have started to ossify the epiphysis since ossification diminishes the usefulness of ultrasound. The angle is formed by a horizontal lin...

Paralabral cysts of the hip joint are a location-specific subtype of paralabral cysts. They are predominantly small, sometimes septate, well-defined multiloculated fluid intensity lesions seen closely associated with acetabular labral tears. Their presence requires a thorough search for a labral...

The extrusion index is a radiographic measurement of femoral head bony coverage by the acetabulum. It is useful in assessing for developmental dysplasia as well as femoroacetabular impingement. It is calculated by dividing the horizontal distance of the lateral femoral head that is uncovered by...

The lateral center-edge angle is a radiographic measurement of femoral head bony coverage by the acetabulum. It has primarily been described in assessing for acetabular dysplasia but can also be used in femoroacetabular impingement. It is calculated on AP pelvic radiographs by using drawing a b...