Fig. 1. Muscle imaging (A and B), chest CT (C), and muscle pathology (D and E: hematoxylin and eosin stain; magnification, ×200). A and B: T2-weighted MR images of the thigh muscle showing diffuse inflammation (A, coronal; B, axial). C: Subpleural consolidation is evident in the left lingular segment (asterisk). D: Muscle pathology reveals predominantly perivascular infiltration of inflammatory cells, an obliterated vessel lumen (arrowhead), and the thickening of vessel walls (arrows). E: Regions away from the perimysium display nonspecific myopathy with scattered small atrophic fibers and increased internalized nuclei.
