Following screening for all of the WS-related and congenital hearing loss disease-causing genes, the proband was found to carry a heterozygous mutation of guanine (G) to adenine (A) in position 336 (c.336G > A) of the third exon of SOX10. This led to a substitution of the 112th codon (p.Met112Ile). This evidence concerns the gene SOX10 and hearing loss disorder.