Seco Z et al. [12] reported that certain mutations of KITLG, including c.286_303delinsT (p.Ser96Ter), c.200_202del (p.His67_Cys68delinsArg), and c.310C > G (p.Leu104Val), cause asymmetric and unilateral hearing loss and Waardenburg syndrome type 2 (WS2). The gene discussed is KITLG; the disease is Waardenburg syndrome type 2.