ArticleThe application of clinical genetics2025
The Masked Thalassemia: A Rare Case of a Patient with Normal HbA2 Levels, β-Thalassemia Pathogenic Variant (CD39 C>T), and a Novel δ-Globin Gene Deletion.
Article in The application of clinical genetics, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Thalassemia is a group of inherited blood disorders caused by defects in hemoglobin production, the protein that transports oxygen in red blood cells. These diseases are characterized by either diminished or missing production of one of the globin chains, which are often the alpha or beta chains that comprise hemoglobin. Diagnosis is based on a combination of laboratory tests, including hemoglobin electrophoresis, globin chain chromatography, and genetic analysis. However, diagnosis can become challenging when typical hematological features of thalassemia are not matched by expected biochemical findings. One such situation occurs when HbA2 levels appear normal despite a suspected β-thalassemia trait. This can happen when a β-globin gene variant is present alongside a δ-globin gene pathogenic variant, producing an atypical profile that may mask the true diagnosis. In this case report, we describe a patient carrying a heterozygous β-globin pathogenic variant (
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