30 specimens of nail fold biopsies have been studied through light and electron microscopy , and direct immunofluorescence , in 26 cases of connective tissue diseases : raynaud 's phenomenon and acrosclerosis ( 7 cases ) , systemic scleroderma ( 10 cases ) , chronic and acute lupus erythematosus ( 4 cases ) , dermatomyositis ( 5 cases ) .
C0009782
of connective tissue
C0011633
dermatomyositis