we think that ( 1 ) changes in skeletal muscles of patients with rheumatoid arthritis and progressive systemic sclerosis may be quite selective , and ( 2 ) the myopathy associated with rheumatoid arthritis can be differentiated from inflammatory myopathies , even in muscle biopsy specimens , on the basis of histoenzymologic investigations .
C0026848
myopathy
C0027121
inflammatory myopathies