NCAM1 and Miyoshi myopathy: A study published in November 2022 and reported in the Journal of Clinical Oncology by Jelinek et al. revealed that a level of 2% of circulating plasma cells (CTCs) would indicate PCL-like multiple myeloma [4]. CTCs look like marrow plasma cells; however, they don't have CD56 expression, while MM cells with PCL have more incidence of monosomy 13, Del 17p, and defects in chromosomes 1, 1q21, and others.