mixed connective tissue disease

Mixedconnectivetissuedisease (MCTD) is a kind of disease with lupus erythematosus, dermatomyositis or polymyositis, scleroderma rheumatoid arthritis and other mixed manifestations at the same time or not, but it is impossible to determine which disease it is. The association of dot-type fluorescent antinuclear antibody and anti-ribonucleoprotein (n-RNP) antibody with high titer in blood...