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Myeloid tissue, in the bone marrow sense of the word myeloid (myelo-+ -oid), is tissue of bone marrow, of bone marrow cell lineage, or resembling bone marrow, and myelogenous tissue (myelo-+ -genous) is any tissue of, or arising from, bone marrow; in these senses the terms are usually used synonymously, as for example with chronic myeloid ...
In hematology, myelopoiesis in the broadest sense of the term is the production of bone marrow and of all cells that arise from it, namely, all blood cells. [1] In a narrower sense, myelopoiesis also refers specifically to the regulated formation of myeloid leukocytes (), including eosinophilic granulocytes, basophilic granulocytes, neutrophilic granulocytes, and monocytes.
Myeloid leukemia is a type of leukemia affecting myeloid tissue. Types include: Acute myeloid leukemia: A cancer of the myeloid line of blood cells, characterized by the rapid growth of abnormal cells that build up in the bone marrow and blood and interfere with normal blood cell production. Chronic myelogenous leukemia: A cancer of the white ...
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A comprehensive diagram of human hematopoiesis. Granulopoiesis consists of 5 stages, in which the myeloblast is the first recognizable cell. Next in the differentiation sequence is the monoblast and the promyelocyte, which can develop into one of three different precursor cells: the neutrophilic, basophilic or eosinophilic myelocyte.
A myeloid sarcoma (chloroma, granulocytic sarcoma, [1]: 744 extramedullary myeloid tumor) is a solid tumor composed of immature white blood cells [2] called myeloblasts. A chloroma is an extramedullary manifestation of acute myeloid leukemia ; in other words, it is a solid collection of leukemic cells occurring outside of the bone marrow .
A typical monoblast is about 12 to 20 μm in diameter, has a nuclear to cytoplasm ratio of 4:1 to 3:1, and, like most myeloid blasts, has a round to oval nucleus with fine chromatin structure. Compared to other myeloid blasts, monoblasts have more cytoplasm. [5] The nucleoli it contains is usually distinct. [6] One to four nucleoli are usually ...
Acute Promyelocytic Leukemia (APL) is a subtype of Acute Myeloid Leukemia, known for its accumulation of abnormal, course, densely granulated promyelocytes in the bone marrow. [6] The excessive proliferation of promyelocytes, attributing at least 30% of the myeloid cells in the bone marrow, result in a depletion of blood cells, including white ...