PCAT1 and Miyoshi myopathy: PCAT‐1 was able to distinguish these two groups with 71.7% sensitivity and 93.8% specificity; its levels correlated with serum β2‐microglobulin levels.16 On contrary, our study used a more comprehensive approach of analysis of 84 lncRNA on a commercial platform and found deregulated expression of PRINS in exosomes of MM and MGUS patients.