PMC3921996_01
Magnetic resonance imaging of the pelvis. Signs of inflammation of the gluteus maximus muscles bilaterally, more so on the left (blue arrow), and the surrounding fascia (red arrow) are indicated.
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PMC3921996_01_edmcr-2013-130008-g001.jpg
fig1
Pathology of the muscle biopsy, 2 weeks after stopping methimazole. (a) Dense eosinophilic infiltration of the myofibers associated with necrosis (red arrow). (b) Dense mixed inflammatory cell infiltrate with associated myofiber necrosis and regeneration (white arrow). (c) Minimal perimysial inflammatory cell infiltrate of plasma cells, eosinophils, and lymphocytes. (d) Fibrofatty tissue with minimal inflammatory cell infiltrate, identical to the previously described one.
edmcr-2013-130008-g002.jpg
PMC3921996_01_edmcr-2013-130008-g002.jpg
fig2
A biopsy taken from the affected gluteus muscle showed dense diffuse perimysial and endomysial eosinophilic infiltrates (Fig. 2).