Table 1.

Clinical and cytogenetic/molecular risk factors for post-MPN AML

Risk factors
Clinical 
 Age >60-65 y 
 Red blood cell transfusion dependency 
 Prior treatment exposure (pipobroman, 32P, chlorambucil, busulfan) 
 Prior thrombosis* 
 Myelofibrosis or prefibrotic ET/PV 
Laboratory 
 Leukocytosis (>15 × 109/L to 30 × 109/L) 
 Anemia (Hgb <10 g/dL) 
 Thrombocytopenia (<50 × 109/L to 100 × 109/L) 
 Peripheral blast count (>1% to 10%) 
 Extreme thrombocytosis (>1000 × 109/L)* 
 Elevated serum IL-8 
 Elevated serum C-reactive peptide 
Cytogenetics 
 Monosomal karyotype 
 Complex karyotype or sole or 2 abnormalities that include +8, −7/7q, i(17q), −5/5q−, 12p−, inv(3), 11q23 rearrangement§ 
 Chromosome 17p deletion 
Molecular 
 TP53, TET2, ASXL1, EZH2, SRSF2, IDH1/2, RUNX1, U2AF1Q157 
Risk factors
Clinical 
 Age >60-65 y 
 Red blood cell transfusion dependency 
 Prior treatment exposure (pipobroman, 32P, chlorambucil, busulfan) 
 Prior thrombosis* 
 Myelofibrosis or prefibrotic ET/PV 
Laboratory 
 Leukocytosis (>15 × 109/L to 30 × 109/L) 
 Anemia (Hgb <10 g/dL) 
 Thrombocytopenia (<50 × 109/L to 100 × 109/L) 
 Peripheral blast count (>1% to 10%) 
 Extreme thrombocytosis (>1000 × 109/L)* 
 Elevated serum IL-8 
 Elevated serum C-reactive peptide 
Cytogenetics 
 Monosomal karyotype 
 Complex karyotype or sole or 2 abnormalities that include +8, −7/7q, i(17q), −5/5q−, 12p−, inv(3), 11q23 rearrangement§ 
 Chromosome 17p deletion 
Molecular 
 TP53, TET2, ASXL1, EZH2, SRSF2, IDH1/2, RUNX1, U2AF1Q157 

Hgb, hemoglobin.

*

Risk factors found specific to the ET subtype.

Risk factors found specific to the MF subtype.

Defined as 2+ autosomal monosomies or single autosomal monosomy associated with at least 1 structural abnormality.

§

As per current DIPSS-Plus criteria.24 

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