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Muscle MRI of case 1. T1 (A,B) showed obvious fat infiltration in thigh muscles, most notably in the vastus lateralis, rectus femoris, biceps femoris, and semimembranosus muscles (red arrow), but the fat infiltration in the vastus intermedius, sartorius, gracilis, and semitendinosus muscles was mild. T2 (C,D) showed obvious inflammation edema in the muscles with mild fat infiltration (black arrow).
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F1
Muscle MRI showed different degrees of fatty infiltration with partial inflammation edema in each muscle group of the thigh (Figures 1A-D).
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