Myeloidinen

Myeloidinen is an adjective used in Finnish medical and scientific language to describe aspects related to the myeloid lineage or to cells derived from it. In adult hematopoiesis, hematopoietic stem cells in the bone marrow differentiate into two main lineages: the myeloid and the lymphoid. The myeloid branch gives rise to erythrocytes (red blood cells), megakaryocytes with platelets, and several white blood cell types, including granulocytes (neutrophils, eosinophils, basophils) and monocytes that mature into macrophages. The myeloid lineage also includes mast cells, which arise from myeloid precursors.

The term myeloidinen is used to distinguish these cell types and processes from those of the lymphoid lineage, which produces T cells, B cells, and natural killer cells. In clinical practice, myeloid versus lymphoid classification helps describe the origin of hematologic diseases. Myeloid disorders include conditions such as acute myeloid leukemia, chronic myeloproliferative neoplasms, and myelodysplastic syndromes, where the development and differentiation of myeloid cells are impaired or abnormal.

Beyond pathology, myeloid cells play key roles in innate immunity and inflammation. Neutrophils and macrophages, for example, are essential for phagocytosis and early defense against pathogens, while mast cells contribute to allergic responses and tissue repair. Overall, myeloidinen describes phenomena associated with bone marrow–derived lineages and their cellular products, in contrast to those arising from lymphoid lineages.