Splice Acceptor Mutation [ HBB :c.93-2A > T] in a Patient with Hb S/β 0 -Thalassemia.

We report a case of Hb S/β ⁰ -thalassemia (Hb S/β ⁰ -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 β ⁰ -thal.