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Figure 5


Fig. 3A —Minute enchondroma or cartilage rest in distal femur of 33-year-old man with knee pain associated with quadriceps and patellar tendon tendinopathy. Coronal T1-weighted (A, TR/TE, 400/18) and fat-suppressed T2-weighted (B, 4,417/41) MR images show minute focal area of marrow replacement with prominent high signal intensity on long-TR image in distal femoral metadiaphysis (arrows). Lesion reveals minimally lobulated margins on T2-weighted image and is more than 1.5 cm from physeal scar (arrowheads). Cause for MRI was quadriceps and patellar tendon tendinopathy (not shown).