Abstract
Serum transferrin receptor (sTfR) originates mostly from erythroblasts and lesser from reticulocytes. The usefulness of sTfR has been implicated in several clinical situations, mainly as a marker of accelerated erythropoiesis or iron deficiency. The assessment of sTfR may be useful in the period of rapid growth during infancy, childhood and adolescence. We evaluated sTfR and the other quantitative and qualitative parameters of the erythropoiesis (Hb, MCV, CHr, Ret-He) and of the iron storage (serum ferritin, sTfR/ferritin index) in a total of 916 children aged 6-10 years. Children were divided into three groups: (A) healthy children, (B) with storage iron deficiency (serum ferritin < 12 microg/l) and (C) Beta trait carriers (HbA2 > 3.3). We determined reference intervals by sex and by age in healthy children. sTfR showed a slight but statistically significant age related increase but did not show significant sex differences. We compared sTfR and the other parameters investigated in the three groups of children. sTfR is not a decisive parameter that can be utilized alone in discriminating the border-line situations between normal and pathologic ones but can help in completing the panel of tests in iron deficiency and in thalassaemia Beta trait carriers.
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