NCAM1 and Miyoshi myopathy: This aggressive case already presented the t(14;16)(q32;q23)IGH/MAF translocation in bone marrow tumoral plasma cells at diagnosis, which, mainly in combination with negative expression of CD56, as observed here, has been associated with an unfavorable outcome in MM (Bhutani et al., 2020; Narita et al., 2015; Shah et al., 2018; Walker et al., 2018).