CD79A and Miyoshi myopathy: Among 355 MM patients, there were 163 cases of IgG, 73 cases of IgA, 107 cases of light chain (κ 51 cases, λ 56 cases), 9 cases of IgD, 1 case of IgM, 1 case of IgE, and 1 case of nonsecretory type.