Among Polish PCD patients, frequently occurring nonsense mutations are found, e.g., in SPAG1 (exon 16: p.Gln672ter), CCDC40 (exon 20: p.Tyr1118ter), DNAH5 (exon 32: p.Arg1711ter, exon 49: p.Arg2677ter, exon 55: p.Arg3096ter), and DNAH11 (exon 70: p.Arg3809tyr). The gene discussed is DNAH5; the disease is primary ciliary dyskinesia.