nucleated red blood cell count (NRBC)

Reference interval

• normally present only in fetus & in very young infants
• adult: 0/uL (none)

Increases

• extreme demand on the marrow
• extramedullary hematopoiesis
• bone marrow infiltration
• erythroblastosis fetalis
• thalassemia major

Specimen

• Whole blood (EDTA)
• Stable for 24 h at 4 C

More general terms

• red blood cell count (RBC)
• nucleated erythrocytes (RBC) in body fluid

More specific terms

• nucleated erythrocytes in blood from fetus
• pronormoblasts in blood

Additional terms

• erythrocyte; red blood cell (RBC)
• nucleated erythrocyte