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. 2011 Feb 18;2(2):13–24. doi: 10.5312/wjo.v2.i2.13

Figure 17.

Figure 17

Left knee medial aspect. Ultrasound demonstrates medial collateral ligament. Joint space is normal. Neutral position. Joint space measures 0.656 cm. The same area under valgus stress, demonstrating joint space of 0.947 cm, pointing to medial collateral ligament insufficiency, clinically manifested by mild knee instability.