Figure 3.

Imaging findings in inclusion body myositis. (A–D) MRI of the thighs from a patient with IBM. Axial T1 images (A,C) showing a proximal-to-distal gradient, with preservation of proximal segments (A) and fatty infiltration of the distal vastus medialis and lateralis bilaterally (C), more pronounced in the right lower limb, with relative sparing of the rectus femoris (arrow). Axial T2 images (B,D) demonstrating sparing of the proximal segments of the quadriceps muscles (B), and only mild T2 hyperintensity surrounding areas of fatty infiltration distally (D). (E) Barium swallow demonstrating a cricopharyngeal bar with severe (more than 75%) luminal narrowing (circle).