Hereditary spherocytosis overlooked for 7 years in a pediatric patient with β-thalassemia trait and novel compound heterozygous mutations of SPTA1 gene.

Hematology
Min ChenFa-Quan Lin

Abstract

Objectives: We aimed to determine the clinical and genetic characteristics of a boy diagnosed with the β-thalassemia trait. He also had hereditary spherocytosis (HS) that had been overlooked for 7 years. Methods: Blood samples collected from the proband and his family were assessed by laboratory tests, and next-generation sequencing (NGS) and Sanger sequencing. Results: The β-thalassemia trait was complicated with HS in the proband. Compound heterozygous mutations of the Spectrin Alpha, Erythrocytic 1 (SPTA1) gene, c.83G > A and c.190G > A in the proband were inherited from his mother and father, respectively, and he also had the heterozygous c.126_129delCTTT mutation in the Hemoglobin Subunit Beta (HBB) gene. The c.190G > A mutation has not yet been added to the Human Gene Mutation Database (HGMD®). The heterozygous HBB c.126_129delCTTT mutation was inherited from his mother, and his older brother also had this mutation. Conclusion: Compared with other patients with either HS or β-thalassemia, this proband with both HS and the β-thalassemia trait had very complicated laboratory findings, which resulted in HS being overlooked for 7 years. Genetic testing is invaluable for the differential diagnosis of hereditary anemias with ov...Continue Reading

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