Identification of a New δ Chain Hemoglobin Variant in a β-Thalassemia Carrier: Hb A2-MUMC [δ13(A10)Ala → Asp]

We describe a case of beta-thalassemia (thal) trait in which the patient also carries a novel delta chain variant due to a missense mutation at amino acid codon 13 (GCC-->GAC, Ala-->Asp). The level of Hb A2 was not elevated, raising the potential for misdiagnosis.