nRBC
Immature red blood cells released early from bone marrow.
What is it
Nucleated red blood cells are immature cells that should remain in the bone marrow. Their presence in blood reflects stress on the bone marrow.
Why it's measured
Nucleated RBCs in adult blood have been associated with severe illness and bone marrow stress in research literature.
Reference range
Standard laboratory reference
0 cells
Reference ranges vary by laboratory. Your individual reference range will appear on your test report and should be interpreted by your physician in the context of your overall health profile.
What results may indicate
Elevated
Has been associated with severe anemia, hypoxia, and bone marrow stress in research literature.
Lower
Generally considered favorable.
These associations are general. They are not a personal diagnosis or prediction. Discuss your individual results with your physician in the context of your full health profile.
When it's measured
Reported when present on automated CBC.
Related markers
Measured in
A complete look at your heart, hormones, metabolism, inflammation, and longevity systems — drawn at Quest or LabCorp, reviewed by a U.S.-licensed physician.
Explore the Apex Panel →This information is for general educational purposes only and is not medical advice. Lab results alone are not intended to diagnose, treat, or cure any condition and do not replace the advice of a healthcare provider. OPTML does not offer medical advice, a diagnosis, medical treatment, or any form of medical opinion.