myeloblast

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myeloblast

 [mi´ĕ-lo-blast″]
an immature cell of bone marrow, not normally found in peripheral blood; it is the most primitive precursor in the granulocytic series, which develops into the promyelocyte and eventually into a granulocyte.

my·e·lo·blast

(mī'ĕ-lō-blast),
An immature cell (10-18 mcm in diameter) in the granulocytic series, occurring normally in bone marrow, but not in the circulating blood (except in certain diseases). When stained with the usual dyes, the cytoplasm is light blue, nongranular, and variable in amount, sometimes being only a thin rim around the nucleus; the latter is deep purple-blue with finely divided, punctate, threadlike chromatin that is somewhat condensed at the periphery. A few light blue nucleoli are usually present in the nucleus, and these generally disappear as the myeloblast matures into a promyelocyte and then a myelocyte. Myeloblasts ordinarily yield a negative reaction with peroxidase.
[myelo- + G. blastos, germ]

myeloblast

/my·elo·blast/ (mi´ĕ-lo-blast″) an immature cell found in the bone marrow and not normally in the peripheral blood; it is the most primitive precursor in the granulocytic series, which matures to develop into the promyelocyte and eventually the granular leukocyte.myeloblas´tic

myeloblast

(mī′ə-lə-blăst′)
n.
An immature cell of the bone marrow that is the precursor of a myelocyte.

my′e·lo·blas′tic adj.

myeloblast

[mī′əlōblast′]
Etymology: Gk, myelos + blastos, germ
earliest recognizable precursor of the granulocytic leukocytes. The cytoplasm appears light blue, scanty, and nongranular when seen in a stained blood film. The nucleus contains distinct chromatin material in strands, together with several nucleoli. In certain leukemias a marked increase in myeloblasts is observed in the marrow and in the peripheral blood. Compare megaloblast, myelocyte, normoblast. myeloblastic, adj.
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Myeloblast

my·e·lo·blast

(mī'ĕ-lō-blast)
An immature cell in the granulocytic series, occurring normally in bone marrow but not in the blood. When stained, the cytoplasm is light blue and variable in amount; the nucleus deep purple-blue with finely divided, punctate, threadlike chromatin. A few light blue nucleoli in the nucleus generally disappear as the myeloblast matures into a promyelocyte and then a myelocyte.
[myelo- + G. blastos, germ]

myeloblast

The bone marrow cell from which the whole series of granular white blood cells (GRANULOCYTES) derives. Up to 3% of bone marrow cells are myeloblasts.

myeloblast

an immature cell of bone marrow, not normally found in peripheral blood; it is the most primitive precursor in the granulocytic series, which develops into the promyelocyte and eventually into a granulocyte.