Myelodysplastic syndromes are a complex and heterogenous group of clonal myeloid neoplasms, characterised by ineffective haematopoiesis, diverse cytopenias, and the risk of progression to acute myeloid leukaemia. Since being identified as a distinct disease in the late 1970s, the journey towards understanding, classifying, and treating myelodysplastic syndromes has been arduous, marked by major advances, yet still hampered by persistent challenges. Today patients with myelodysplastic syndromes continue to face low long-term survival, with a 5-year overall survival rate of approximately 37%, and no curative treatments outside haematopoietic stem-cell transplantation.