The high expression of CRBN and DDB1 was significantly associated with elevated beta-2-microglobulin level (p=0.041 and p=0.013, respectively). The patients with high CRBN expression also had the higher level of monoclonal protein (p=0.004), the lower haemoglobin concentration (p=0.035) and poorer response to IMiDs treatment (p=0.034)...