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With the leg flexed to 90°, the vastus medialis oblique is palpated and its border marked. The proximal pole and the medial and lateral borders of the patella are marked. Keep in mind the importance of distinguishing the lateral border of the patella from the lateral trochlear ridge. A 2-cm vertical mark is made extending proximally from the proximal pole. At this point, our anterolateral, anteromedial, and far medial portal sites may also be marked.
