Promonocyte
- Size : Large, 20 µm
- N/C ratio= Quite low, 0.4
- Cytoplasm
- Extension : Abundant
- Basophilia : Slightly intense
- Number of granules : Rare
- Color of granules : Red = azurophils
- Membrane : Regular
- Nucleus
- Situation : Central
- Chromatin : Fine
- Nucleoli : Absent
- Membrane : Regular
- Normal values : Absent in the blood and in the bone marrow
- Description / Pathology :
Large size cell, indented nucleus, with no nucleolus, quite fine chromatin, sometimes vacuolated gray cytoplasm.
Intermediate stage between monoblast and mature monocyte.Acute monoblastic Leukemia = AML5b (mainly monocyte maturation).
Chronic myelomonocytic leukemia CMML.