Hb Feilding [β12(A9)Thr → Pro; HBB: c.37A>C]: a novel unstable β-globin chain variant.

We report here a patient heterozygous for a previously unreported β chain variant. A 72-year-old Caucasian female was found to have an abnormal hemoglobin (Hb) as an incidental finding following Hb A1C analysis. There was no family history of anemia or hemoglobinopathy.