Synonyms:
Steroid induce myopathy
Diagnosis:
This is a clinical diagnosis supported by exclusion of other causes. Usually it does not require biopsy but often it is used in cases of uncertainty
Clinical features:
Proximal weakness, usually gradual onset
Findings on investigations:
+/-CK normal or reduced
+/-Muscle biopsy: Type 2 fibre atrophy, especially type 2B. Lipid and/or glycogen accumulation can occur. Vacuolar myopathy can occur.