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Fig. 5B. —Cartilage flap lesion in 39-year-old man who fell from ladder. Coronal fat-suppressed fast spin-echo MR image (4550/96) shows that fragment (arrow) remains attached laterally through intact bridge of cartilage (arrowhead). Compare with Figure 1B. Note edema is present within overlying subchondral bone but not in chondral fragment. At arthroscopy (not shown) flap was removed and subchondral bed was treated by microfracture technique.