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Hemoglobin ; 48(1): 30-33, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-38198563

RESUMO

Unstable variant hemoglobinopathies are an uncommon cause of hemolysis in the pediatric patient and may cause a delay in diagnosis if there is not a high index of suspicion. Hemoglobin (Hb) Mizuho is a rare unstable hemoglobinopathy caused by a pathogenic variant of the HBB gene with a severe phenotype. Here we report on the first known case of Hb Mizuho in Australia, presenting with features of acute and chronic hemolysis. The morphological features on blood film review, in conjunction with biochemical findings and other clinical features, did not immediately suggest an alternative diagnosis and a Next Generation Sequencing gene analysis approach was taken to investigate genes associated with red blood cell disorders and atypical uremic syndrome. The HBB Mizuho variant was detected and established the diagnosis. This report highlights the challenge of diagnosing Hb Mizuho on conventional testing and the need for early genomic testing to clarify a diagnosis.


Assuntos
Hemoglobinopatias , Hemoglobinas Anormais , Humanos , Criança , Hemólise/genética , Hemoglobinas Anormais/genética , Hemoglobinopatias/diagnóstico , Hemoglobinopatias/genética , Testes Genéticos
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