PLK1 expression levels in MDS patients according to prognostic factors: Bone marrow blast percentage (A), IPSS-R cytogenetic categories (B), absolute neutrophil count (C), hemoglobin level (D), and platelet count (E).

Abbreviations: 18S rRNA, 18S ribosomal RNA; ANC, absolute neutrophil count; Int, intermediate; IPSS-R, Revised International Prognostic Scoring System; MDS, myelodysplastic syndromes; PLK1, polo-like kinase 1 gene; sAML, secondary acute myeloid leukemia.