TP53 and myelodysplastic syndrome: Given the importance of p53 in the physiopathology of del(5q) MDS as a result of ribosomal stress, the greater incidence of TP53 mutations in this MDS subtype, as well as our previous study of R72P SNP alone, it was imperative that we analyze del(5q) MDS and non-del(5q) MDS separately.