Waardenburg syndrome (WS) is an orphan genetic disease with autosomal dominant pattern of inheritance characterised by varying degrees of hearing loss accompanied by skin, hair and iris pigmentation abnormalities. Four types of WS differing in phenotypic characteristics are now described. We performed a Sanger sequencing of coding regions of genes and in the patient with WS from a Yakut family living in the Sakha Republic. No changes were found in the and coding regions while a previously reported heterozygous transition c.772C>T (p.Arg259*) in exon 8 of the gene was found in this patient. This patient presents rare phenotype of WS type 2: congenital unilateral hearing loss, unilateral heterochromia of irises, and absence of skin/hair depigmentation and dystopia canthorum. Audiological variability in WS type 2, caused by the c.772C>T (p.Arg259*) variant in the gene, outlines the importance of molecular analysis and careful genotype-phenotype comparisons in order to optimally inform patients about the risk of hearing loss. The results of this study confirm the association of pathogenic variants in the gene with WS type 2 and expanded data on the variability of audiological features of the WS.