PLK1 expression levels in patients with sAML according to whether the disease developed “naturally” or after hypomethylating treatment failure.

Abbreviations: 18S rRNA, 18S ribosomal RNA; PLK1, polo-like kinase 1 gene; sAML, secondary acute myeloid leukemia; sAML-HF, patients who developed secondary acute myeloid leukemia after hypomethylating treatment failure; sAML-natural, patients who developed secondary acute myeloid leukemia with no prior disease-modifying treatment.