Percentile curves for red cell indices of beta zero-thalassaemia heterozygotes in infancy and childhood.

Abstract:

:This paper describes the percentile curves for red blood cell (RBC) count, Hb, mean corpuscular volume (MCV) and mean corpuscular haemoglobin (MCH) values of beta zero-thalassaemia heterozygotes during infancy, childhood and adolescence. Hb values were about 2 g/dl below those of normal controls with a progressive increase with age paralleling the normal developmental trend. The Hb increase with age was due to a progressive rise in the Hb content per cell, the number of RBC remaining nearly constant. MCV and MCH values also increased with age with a pattern parallel to normal control. Because of the high prevalence of alpha-thalassaemia in the Sardinian population, to which all the subjects investigated belong, the 3rd MCH-MCV percentile curves of normal overlap the 97th curve of beta-thalassaemia heterozygotes. The HbA2 levels, however, were always increased as compared to normal. These results confirm in children than screening for heterozygous beta-thalassaemia in populations with a high incidence of alpha and beta-thalassaemia by MCV-MCH determination may overlook a sizeable proportion of beta-thalassaemia carriers. The knowledge of the extent of variation of RBC indices of beta-thalassaemia heterozygotes during infancy, childhood and adolescence, is very useful for the evaluation of a child presenting with a mild microcytic anaemia.

journal_name

Eur J Pediatr

authors

Galanello R,Lilliu F,Bertolino F,Cao A

doi

10.1007/BF02093721

subject

Has Abstract

pub_date

1991-04-01 00:00:00

pages

413-5

issue

6

eissn

0340-6199

issn

1432-1076

journal_volume

150

pub_type

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