A Novel Human β-Globin Gene Variant [Hb London-Ontario, HBB: c.332T>G] is Associated with Transfusion-Dependent Anemia in a Patient with a Hemoglobin Electrophoresis Pattern Consistent with β-Thalassemia Trait

We present the case of a novel β-globin gene variant associated with early-onset transfusion-dependent anemia compatible with a β-thalassemia major (β-TM) phenotype in a patient of British descent. As a child, our patient developed chronic symptomatic anemia with hemoglobin (Hb) nadirs of 3.0 g/dL. She started receiving occasional transfusions by the age of 13 years and became transfusion-dependent by the age of 32 years. Work-up performed at …