Normal values of total reticulocytes and reticulocyte subsets in children and young adults.

: This work provides the values for percentage and total reticulocyte count, as well as the values of reticulocyte fluorescence intensity ratios as determined by an automated fluorescent technique in a normal pediatric population. The peripheral reticulocyte subsets, as assessed on the basis of their degree of maturation, allow a more accurate evaluation of bone marrow activity than the percentage or total count do. This would result in a more appropriate management of erythropoietic disorders in children.