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Fluoroscopic image of right knee. The position of Beath pin for femoral attachment of medial patellofemoral ligament on anteroposterior (A) and lateral (B) images of knee. On the lateral view, both femoral condyles should precisely overlap posteriorly and distally (solid arrow). The pin is directed anteriorly in the triangle formed by the Blumensaat line, distal femoral physis, and the transphyseal screw. A hemostat (dashed arrow) marks the entrance of the Beath pin.
