A promyelocyte (or progranulocyte) is a granulocyte precursor, developing from the myeloblast and developing into the myelocyte. Promyelocytes measure 12-20 microns in diameter. The nucleus of a promyelocyte is approximately the same size as a myeloblast but their cytoplasm is much more abundant. They also have less prominent nucleoli than myeloblasts and their chromatin is more coarse and clumped. The cytoplasm is basophilic and contains primary red/purple granules.
|Gives rise to||Myelocyte|
|Anatomical terms of microanatomy|
Promyelocyte from bone marrow examination
- Histology image: 01806loa – Histology Learning System at Boston University - "18. Bone Marrow and Hemopoiesis: bone marrow smear, promyelocyte and erythroblasts "
- Histology at KUMC blood-blood08 "Bone marrow"
- Histology at KUMC blood-blood11 "Bone marrow"
- "White Cell Basics: Maturation" at virginia.edu
- Histology image: 75_02 at the University of Oklahoma Health Sciences Center - "Bone marrow smear"
- Promyelocyte at the US National Library of Medicine Medical Subject Headings (MeSH)
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