Recently, it has been also reported a distinct CRBN substrate, Casein Kinase 1 alpha (CK1-α) that is ubiquitinated and degraded after LEN treatment in myelodysplastic syndrome (MDS) with deletion of chromosome 5q (del(5q)) [14] and in MM, as reported by Manni S et al. [15]. The gene discussed is CRBN; the disease is Miyoshi myopathy.