What is NPM1 in AML?
Mutations of Nucleophosmin (NPM1) are the most common genetic abnormalities in adult acute myeloid leukaemia (AML), accounting for about 30% of cases. NPM1-mutated AML has been recognized as distinct entity in the 2017 World Health Organization (WHO) classification of lympho-haematopoietic neoplasms.
What is an NPM1 mutation?
Mutations in the NPM1 gene are involved in a form of blood cell cancer known as cytogenetically normal acute myeloid leukemia (CN-AML). While large chromosomal abnormalities can be involved in the development of acute myeloid leukemia, about half of cases do not have these abnormalities; these are classified as CN-AML.
How I treat AML NPM1?
The identification of new molecular subtypes within NPM1-mutated AML patients is relevant in the prediction of treatment response and outcome. Currently, most patients with a NPM1 mutation and without a FLT3-ITD mutation, are treated with conventional induction and consolidation chemotherapy.
What is the survival rate of AML leukemia?
The 5-year survival rate for people 20 and older with AML is 26%. For people younger than 20, the survival rate is 68%. However, survival depends on several factors, including biologic features of the disease and, in particular, a patient’s age (see Subtypes for more information).
How are mutations detected in NPM1?
There are highly specific and sensitive molecular assays available for detecting NPM1 mutations, like Sanger sequencing, high-resolution melting curve analysis, real-time polymerase chain reaction (PCR), and pyrosequencing (Pyr).
Which finding is associated with a worse prognosis in AML with NPM1 mutation?
These data suggest that NPM1 mutations confer a favorable risk only in the absence of any adverse risk features. In fact, among patients with NPM1-mutant AML, the presence of adverse cytogenetics seems to yield an even worse prognosis than a concomitant FLT3-ITD mutation.
Where is NPM1?
Nucleophosmin (NPM), also called nucleolar protein B23, numatrin, or NO38, is an abundant phosphoprotein that is ubiquitously expressed and highly conserved. The nucleophosmin gene (NPM1) is located on chromosome 5q35 and contains 12 exons8.
What is a common myeloid blast Immunophenotype in AML with NPM1 mutation?
The most common blast phenotype in myeloid AML-NPM1 was a CD34−/HLA-DR− phenotype (69 [49%] of 141).
