Splice Acceptor Mutation [HBB:c.93-2A > T] in a Patient with Hb S/β0-Thalassemia

We report a case of Hb S/β⁰-thalassemia (Hb S/β⁰-thal) in a patient who is a compound heterozygote for the Hb Sickle mutation (HBB:c.20A > T) and a mutation of the canonical splice acceptor sequence of IVS1 (AG > TG, HBB:c.93-2A > T). This is the fifth mutation involving the AG splice acceptor site of IVS1, all of which prevent normal splicing and cause β⁰-thal.