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McMaster Textbook of Internal Medicine

Erythroblasts (Nucleated Red Blood Cells [NRBC])

How to Cite This Chapter: Don-Wauchope A, Chetty VT, Ivica J, Kavsak P, Khan WI, Lafreniere M, Nouri K, Solnica B. Erythroblasts (Nucleated Red Blood Cells [NRBCs]). McMaster Textbook of Internal Medicine. Kraków: Medycyna Praktyczna. https://empendium.com/mcmtextbook/chapter/B31.1269.3.7.27.17. Accessed December 05, 2025.
Last Reviewed: May 9, 2022
Last Updated: May 9, 2022
Chapter Information

For a brief introduction and guide to abbreviations, see Laboratory Tests: General Remarks.

Analyte [material]

Erythroblasts (nucleated red blood cells [NRBCs])

Reference range, target level, or decision threshold

0/microL

Interpretation of results

Increased erythropoiesis (eg, during recovery after bleeding, severe hemolytic anemia) or abnormal erythropoiesis (eg, myelofibrosis, metastases of solid tumors to bone marrow, certain types of acute myeloid leukemia [acute erythroid leukemia])

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