NCAM1 and Miyoshi myopathy: Several common features have been reported in t(11;14) positive MM cases such as higher incidences of specific M protein subtypes (light chain only, immunoglobulin (Ig) M, IgE, and non-secretory) [6, 8] and unique surface molecule expression patterns (higher CD20 positivity and decreased CD56 expression) of BMPCs [9].