Sarcoidosis of skeletal muscle

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Abstract
A case of skeletal muscle sarcoidosis simulating progressive muscular dystrophy is presented. The 27 similar cases of sarcoidosis of skeletal muscle reported in the literature are summarized and the clinical features of the disease discussed. Electromyography is helpful in differentiating myogenic from neurogenic disease. The demonstration of atypical myotonic potentials and short duration dystrophic potentials is seen in this case. Because the incidence of this syndrome in postmenopausal women is relatively high, it appears that some contributing endocrine factor may be present. Corticosteroids, in some cases in conjunction with antituberculosis therapy, are used in treatment of this form of sarcoidosis.