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Knee. Infiltration of cortisone and anesthetic in a parameniscal cyst. A) US image performed in the coronal plane shows the cyst (black arrowheads) as a hypoechoic mass, which contains thin septa, adhering to the inner aspect of the body meniscus. B) Image showing the correct position of the 19-Gauge needle (white arrowhead) whose tip is at the center of the mucoid cyst.
