CAPN3 and myotonic dystrophy type 2: There were statistically significant differences in muscle PDFF between patients with DM2, LGMD2A, and Pompe disease for the gracilis (p = 0.04), biceps femoris (p < 0.01), semimembranosus (p < 0.01), and semitendinosus muscles (p < 0.01; Table 5).