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Histopathologic study of skeletal muscle biopsy in a patient with eosinophilia-myalgia syndrome following L-tryptophan use showed prominent lymphocytic perineuritis,neuritis,and perimysial fasciitis.The presence of perineuritis and neuritis provides a histopathologic basis for clinical features of neuropathy in eosinophilia-myalgia syndrome and occurred in conjunction with a fasciitis or interstitial myositis that was predominantly perimysial and focally endomysial. |
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