myeloblast
Noun A myeloblast is an immature cell found in the bone marrow. It is the earliest identifiable precursor cell in the development of granulocytes, a type of white blood cell (leukocyte). Under normal conditions, myeloblasts are present only within the bone marrow.
The term is used primarily in medical and biological contexts to describe a specific stage in blood cell formation (hematopoiesis). * In a healthy state, myeloblasts are confined to the bone marrow and are not found in the circulating blood. * The presence of myeloblasts in the peripheral blood is often an abnormal finding, associated with certain diseases.
- The hematologist examined the bone marrow biopsy to count the number of myeloblasts.
- A high percentage of myeloblasts in the bone marrow can be indicative of acute myeloid leukemia (AML).
- Normal differentiation involves the myeloblast maturing into a promyelocyte.
- Myeloblast Count: A critical parameter in diagnosing and classifying leukemias. An increased count is a hallmark of acute myeloid leukemia.
- Myeloblast vs. Lymphoblast: In hematology, distinguishing a myeloblast from a lymphoblast (a precursor to lymphocytes) is essential for accurate diagnosis, as they represent different lineages of white blood cells.
- Myeloblastic (adjective): Relating to or resembling a myeloblast.
- Example: The patient was diagnosed with a myeloblastic disorder.
- Promyelocyte (noun): The developmental stage immediately following the myeloblast.
- Granulocyte (noun): The mature type of white blood cell (e.g., neutrophil, eosinophil, basophil) that a myeloblast ultimately becomes.
- Immature granulocyte precursor
- Granulocyte precursor cell (Note: "Myeloblast" is the precise technical term; synonyms are descriptive phrases.)
The definition is highly specific to cell biology and pathology. It does not have figurative meanings or common idiomatic uses. Its meaning is directly tied to its role in the formation of the body's immune cells.
- a precursor of leukocytes that normally occurs only in bone marrow