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CASE REPORTS
JOURNAL ARTICLE
Diagnostic difficulty of beta-thalassemia syndrome in a multi-transfused patient: contribution of myelogram and studying parents.
Annales de Biologie Clinique 2017 October 2
We report the case of a 5 year old, initially followed for congenital sideroblastic anemia, whose explorations reveal a complex family hemoglobinopathy. Myelogram performed in children, reveals dystrophic mature erythroblasts with hemoglobinization defect and basophil punctuations. These abnormalities point towards an abnormal synthesis of heme or globin chains. Iterative transfusions in child do not allow interpreting a search for abnormal hemoglobin. However, the analysis carried out in his parents, with increased HBA2 rate and microcytosis concluded in beta-thalassemia trait for father and mother. Knowing that beta-thalassemia syndrome is a genetic condition, usually recessive, the presence of beta-thalassemia trait in parents is in favor of a beta-thalassemia syndrome in child. This diagnostic hypothesis is confirmed by molecular study of globin genes that will reveal a complex hemoglobinopathie for all family's members. The parents are carriers for heterozygous mutation of β+ thalassemia that the sick child presents in homozygous state supporting the diagnosis of beta-thalassemia syndrome. Moreover, a triple α globin gene is present respectively at heterozygous state for mother and at homozygous state for father and child. The triple α globin gene is a known factor of aggravation of beta-thalassemia and this clinical case with continuum observed, perfectly illustrates the intricacies between α and β globin genes.
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