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Fig. 2B —Medial meniscal flounce on routine left knee MR images of 43-year-old man with anterior cruciate ligament tear, lateral meniscus tear, and medial meniscus degeneration. Sagittal proton density-weighted (TR/TE, 3,300/16) images show bowtie appearance and next lateral image in neutral (A), maximally extended (B), and maximally flexed (C) knee in a surface coil. From neutral to maximally extended position, flounce disappears, with anterior migration of anterior horn and slightly posterior migration of posterior horn. With maximally flexed knee, flounce is slightly released but is still evident, with posterior migration of both horns. Distances between anterior horn margin and anterior tibial margin (A in Fig. 1) are 5.19 mm in A, 0 mm in B, and 7.74 mm in C, representing anterior migration of anterior horn as knee is extended farther. Distances between posterior horn margin and posterior tibial margin (P in Fig. 1) are 6.64 mm in A, 4.7 mm in B, and 4.2 mm in C.