Abstract
A 49-year-old Japanese woman treated with oral corticosteroids, methotrexate, and infliximab for malignant rheumatoid arthritis was admitted because of fever and low back pain. The white blood cell count and C-reactive protein concentration were elevated. Lumbar and pelvic computed tomography showed enlargement of the piriformis muscle including a hypodense area consistent with gas formation. The patient was treated successfully for infectious myositis with intravenous antibiotics.
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Oda, S., Fujinaga, H. & Takahashi, K. Infectious myositis involving the piriformis in a patient with rheumatoid arthritis. Mod Rheumatol 16, 260–263 (2006). https://doi.org/10.1007/s10165-006-0493-3
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DOI: https://doi.org/10.1007/s10165-006-0493-3