AML with gain of chromosome 8 as the sole chromosomal abnormality (+8sole) is associated with a specific molecular mutation pattern including ASXL1 mutations in 46.8% of the patients

Trisomy 8 is the most frequent cytogenetically gained aberration in AML. We compared 79 adult de novo AML with trisomy 8 as the sole cytogenetic abnormality (+8sole) to 511 normal karyotype AML patients (NK). +8sole patients were older (p = 0.013), presented lower WBC counts (p = 0.010), harbored more often ASXL1 mutations (p < 0.001) and RUNX1 mutations (p = 0.009), but less frequent FLT3-ITD (p = 0.038), NPM1 mutations (p < 0.001) and double-mutated CEBPA (p = 0.038) than NK patients. No prognostic difference was found between +8sole and NK. With respect to genetic stability we found +8sole was instable, and molecular markers were either stable or gained in number and diversity.