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Fig. 1B. 41-year-old woman with quadriceps fat pad mass effect and
anterior knee pain. Sagittal intermediate T1-weighted proton
densityweighted spin-echo MR image (A) and sagittal (B)
and axial (C) proton densityweighted fast spin-echo MR images
with fat saturation show enlarged quadriceps fat pad (arrows) with
abnormal convex posterior border and increased signal intensity equal to
muscle or hyaline cartilage. Note articular muscle (arrowhead,
A).