X-Ray Rounds. Cass Djurfors Feb 20, 2003. 10 y.o. boy with leg pain. Obese 10-year old male presents with a two week history of right thigh and knee pain. He states that the pain is mainly in his thigh (points to his upper thigh) but radiates down to his knee. . 10 y.o. boy with leg pain.
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Feb 20, 2003
Klein line: a line drawn along the superior border of the proximal femoral metaphysis should intersect part of the proximal femoral epiphysis
Lateral view showing an early slipped capital femoral epiphysis. Note the subtle posterior step-off of the epiphysis on the metaphysis at the physeal level (arrow).
Klein's line, the line along the superior aspect of the femoral neck. (Left) In the normal hip, the superior border of the epiphysis projects superiorly to Klein's line. (Right) In a hip with an early slipped capital femoral epiphysis, the superior border of the epiphysis lies on Klein's line. In more advanced cases, the epiphysis projects inferiorly to it. Note the metaphyseal blanch sign of Steel (arrow).