The term 'NRBC' – 'nucleated red blood cells' – refers to precursor cells of the red blood cell lineage which still contain a nucleus; they are also known as erythroblasts or – obsolete – normoblasts. In healthy adults and older children, NRBC can only be found in blood-building bone marrow where they mature. Nucleated RBCs (NRBC, normoblasts) are a very immature form of RBCs seen when there is a severe demand for RBCs to be released by the bone marrow or marrow involvement by fibrosis or tumor;
They may be seen in:
Nucleated RBCs can be normal in infants for a short time after birth.
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Alpha-1-Antitrypsin, Serum, Ammonia, Angiotensin-1-Converting Enzyme, Beta-2 Glycoprotein I Ab, IgA, Bicarbonate (HCO3), Serum, C-Reactive Protein (CRP), Carcinoembryonic Antigen (CEA), D-Dimer, Factor IX Activity, Factor VII Activity, Factor VIII Activity, Factor X Activity, Factor XI Activity, Ferritin, Ferritin (female range), Fibrinogen Activity, Fibrinogen Antigen, Haemoglobin A1c, Haptoglobin, Iron, IRON (Serum), Lactate Dehydrogenase (LDH), Large Unstained Cells (LUC), Large Unstained Cells (Percent), Magnesium, RBC, Nucleated red blood cell (NRBC), Plateletcrit (PCT), Reticulocyte Count, Thrombocytes, Total iron-binding capacity (TIBC), Transferrin, Transferrin saturation (Iron Saturation), UIBC