CUBN and Miyoshi myopathy: When the purified monoclonal Igs from MGUS/SMM or MM patients were analyzed (Table 1, Figure 1, Figure 2 and Figure S2), 24/143 (16.8%) MGUS/SMM patients (24 MGUS, 0 SMM) and 13/90 (14.4%) of MM patients had a purified monoclonal Ig that recognized GlcSph.