TP53 and Myelodysplasia: Although the systems diverge in the case of TP53 mutation, they both recognize copy number changes affecting TP53 as myelodysplasia-related cytogenetic abnormalities (i.e., monosomy 17, deletion of 17p, isochromosome 17q, and other abnormalities leading to deletion or loss of 17p, see Table 2) [2,3,4].