The most common variants in HL carriers were c.235delC of GJB2, c.919‐2A>G of SLC26A4, and m.1555A>G of MT‐RNR1, and those in thalassemia carriers were ‐SEA, ‐α3.7, and HBB:c.126_129delCTTT. The gene discussed is MCAT; the disease is thalassemia.