Monocytes %
The share of white blood cells that are monocytes, which become tissue macrophages.
| Typical reference range | 4–13 % |
Ranges vary by laboratory, method, age and sex: always use the range printed on your own report. Why labs differ.
What it measures
Monocytes circulate for a few days before entering tissues and becoming macrophages and dendritic cells, which clear debris, fight infections and coordinate immunity.
Why it matters
Elevated monocytes can indicate chronic infection or inflammation. As with other percentages, the absolute count is more informative.
What a high result can mean
High percentages occur with recovery from acute infection, chronic infections (tuberculosis, endocarditis), autoimmune and inflammatory diseases, and some blood disorders.
What a low result can mean
Low percentages are usually not significant; marked reductions may occur with corticosteroids, marrow suppression or hairy cell leukemia.
What affects the result
Interpret with the absolute monocyte count.
Unit
Usually reported in %.
Also called on lab reports
Monocytes, Mono %, Monocyte %, Monos, Monocytes (%), Monocytes, Percent
Related tests: White Blood Cells & Differential
This page is educational and does not replace advice from a healthcare professional.