[Myelodysplastic/myeloproliferative neoplasm: a histopathological review].

Myelodysplastic syndromes/myeloproliferative neoplasm (MDS/MPN) is a type of myeloid neoplasm where at least one hematopoietic lineage exhibiting cytopenia clinically coexists with other (s) exhibiting hypercytosis. There is ineffective erythropoiesis and bone marrow coexistence of at least one hematopoietic lineage morphologically characterized by dysplasia of blood cells and other (s) characterized by pronounced proliferation. At a molecular level, various abnormalities have been identified that overlap with related diseases, and a prerequisite for MDS/MPN diagnosis includes ruling out various hematopoietic tumors and reactive conditions. Therefore, a multilateral approach involving clinical findings, morphology, and molecular biology is needed. Herein, we introduce the pathological features of MDS/MPN and the relationship between molecular abnormalities and morphological characteristics.