... replacement. Aza, azathioprine; CK, creatinine kinase; CRP, C-reactive protein; CyA, cyclosporin A; DM, dermatomyositis; EMG, electromyography; IIM, idiopathic inflammatory myositis; IU/l, international ... explain. Thus, it is also increasingly rec-ognised in myositis that any correlation between the observedweakness of a muscle and the degree of its inflammatory cellinfiltration at biopsy may ... in which muscle wasting may beradiologically and even clinically obvious, weakness may beexplained by loss of muscle mass which, once established,often appears irreversible. In the early acute...