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A schematic is shown of the various patterns of the layers of the quadriceps tendon. (A) A sagittal section of the patella and its relation to the quadriceps and patellar tendons is illustrated. (B) Bilaminar, (C) trilaminar, and (D) quadrilaminar patterns of the quadriceps tendon are shown. R = Rectus femoris, L = Vastus lateralis, M = Vastus medialis, I = Vastus intermedius.
