PMC5968255_01
a, b Brachium magnetic resonance imaging showed increased signal intensity in the left triceps and deltoid muscles on short tau inversion recovery imaging (arrows). c, d Muscle biopsy examination of the left biceps brachii muscle revealed perifascicular atrophication and inflammatory myopathy (hematoxylin and eosin staining).
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Brachium magnetic resonance imaging showed increased signal intensity in the left triceps and deltoid muscles on T2-weighted imaging and short tau inversion recovery imaging (Fig. 1a, b, arrows). Muscle biopsy examination of the left biceps brachii muscle revealed perifascicular atrophication and inflammatory myopathy (Fig. 1c, d).