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Fig. 1 —T1-weighted coronal image of right knee at midpoint in 20-year-old asymptomatic male athlete shows medial meniscal extrusion of 5.7 mm. Meniscal extrusion is measured by distance from perpendicular line to edge of tibial plateau and edge of meniscus (white lines). Vertical tear of medial meniscus and sclerosis of subarticular medial tibial plateau with small marginal osteophyte indicating degenerative change are present. No joint effusion is shown.