Myelocyte
{{Short description|Young granulocytic white blood cell}}
{{Infobox cell
| Name = Myelocyte
| Latin =
| Image = Hem1Myelocyte.jpg
| Caption =
| Image2 =
| Caption2 =
| System =
| Artery =
| Vein =
| Nerve =
| Lymph =
| Precursor = Promyelocyte
| GivesRiseTo = Metamyelocyte
| Location = Bone marrow
}}
File:Eosonophilic myelocyte.png
File:Neutrophilic myelocyte.png
A myelocyte is a young cell of the granulocytic series, occurring normally in bone marrow (can be found in circulating blood when caused by certain diseases).
Structure
When stained with the usual dyes, the cytoplasm is distinctly basophilic and relatively more abundant than in myeloblasts or promyelocytes, even though myelocytes are smaller cells.
Numerous cytoplasmic granules are present in the more mature forms of myelocytes. Neutrophilic and eosinophilic granules are peroxidase-positive, while basophilic granules are not.
The nuclear chromatin is coarser than that observed in a promyelocyte, but it is relatively faintly stained and lacks a well-defined membrane.
The nucleus is fairly regular in contour (not indented), and seems to be 'buried' beneath the numerous cytoplasmic granules. (If the nucleus were indented, it would likely be a metamyelocyte.)
=Measurement=
There is an internationally agreed method of counting blasts, with results from M1 upwards.
Development
Promyelocyte → Myelocytes → metamyelocytes.
Additional images
File:Hematopoiesis (human) diagram en.svg|Hematopoiesis
See also
References
{{Reflist}}
External links
- [http://www.healthsystem.virginia.edu/internet/hematology/HessEDD/Normal-hematopoietic-cells/Neutrophilic-myelocyte.cfm Neutrophilic Myelocyte] Presented by the University of Virginia
- [http://www.healthsystem.virginia.edu/internet/hematology/HessEDD/Normal-hematopoietic-cells/Eosinophilic-myelocyte.cfm Eosinophilic Myelocyte] Presented by the University of Virginia
- [http://www.healthsystem.virginia.edu/internet/hematology/HessEDD/Normal-hematopoietic-cells/Immature-basophil.cfm Basophilic Myelocyte] Presented by the University of Virginia
- [http://meds.queensu.ca/medicine/deptmed/hemonc/anemia/myelo.htm Image at queensu.ca] {{Webarchive|url=https://web.archive.org/web/20070827124407/http://meds.queensu.ca/medicine/deptmed/hemonc/anemia/myelo.htm |date=2007-08-27 }}
{{Myeloid blood cells and plasma}}
{{Authority control}}