TP53 is a well known tumor suppressor gene that is mutated in wide variety of cancers. In terms of myeloid disorders, missense, nonsense, and frameshift mutations of TP53 tend to occur in the DNA binding domain and have been reported in approximately 4% of cases of AML where they tend to be associated with a poorer prognosis and an adverse cytogenetic risk profile. TP53 mutations also occur in approximately 10% of patients with myelodysplastic syndrome (MDS) and are often associated with poorer prognosis, adverse cytogenetic profile and deletion of 5q either in isolation or as part of a complex karyotype.