The critical function of this protein family in genome maintenance is underscored by the fact that defects in three of the five family members – WRN, Bloom Syndrome RecQ Like Helicase (BLM) and RecQ Like Helicase 4 (RECQL4) – give rise to human disease syndromes associated with developmental defects and cancer predisposition (Brosh, 2013; Oshima et al., 2017). This evidence concerns the gene BLM and cancer.