Steroid myopathy: clinical and immunohistochemical study of a case

A 42 year old woman with foot process disease, was treated with corticosteroids for 6 years. She had been suffering, for about 3 years from progressive muscle weakness of the limbs, accompanied by general paresthesia, cramps of the calves and burning muscle pain both at rest and an effort. The clinical, neurophysiological and histochemical examination indicated noninflammatory myopathic damage. The progressive reduction of corticosteroid dosage led rapidly to a distinct improvement, but not to a remission, of symptoms. Clinical and laboratory findings were consistent with those observed in most cases of steroid myopathy described in literature. We discuss the possible pathogenetic role of corticosteroids in this affection.