NSD2 and Miyoshi myopathy: 10x Genome sequencing detected in patients P1 and P2 the second most common IGH translocation in MM, t(14;16)(q32;q23), involving the transcription factor MAF. Patients P3 and P4 had IGH translocations t(4;14)(p16;q32), involving FGFR3 and NSD2, with the remaining three patients (P5–P7) having no detectable translocation involving any of the Ig loci (Supplemental Table S5).