Since PRDM9 variability has been suggested to influence genomic instability, the authors of this study argued that these rare allelic forms could be involved in the development of preleukemic clones in B-ALL patients and proposed that an altered PRDM9 function in the parental germline could lead to the genomic instability associated with childhood ALL [155]. The gene discussed is PRDM9; the disease is acute lymphoblastic leukemia.