perkin line
Developmental
dysplasia of hip. Patient B: Normal-positioned right femoral head is noted (black circle). Left smaller femoral head is located superolateral to Hilgenreiner"s and Perkin"s lines (red circle), while its normal position is inferomedial to them (black circle).
Perkin line is a line drawn perpendicular to Hilgenreiner line, intersecting the lateral most aspect of the acetabular roof.
The upper femoral epiphysis should be seen in the inferomedial quadrant: it should lie below Hilgenreiner line, and medial to Perkin line. If the nucleus of the femoral head is not visible because it is not ossified yet, the femoral metaphysis should be used.
Lateral displacement of the femoral head occurs in developmental dysplasia of the hip (DDH).
See also
- developmental dysplasia of the hip (DDH)
- sonographic classification of DDH
- beta angle
- alpha angle
- Hilgenreiner line
Siehe auch:
und weiter:
Assoziationen und Differentialdiagnosen zu Perkin's line:
