The results of DNA analysis in the three patients confirmed the clinical diagnosis of KID syndrome in patient 1 [heterozygous mutation p.Asp50Asn (c.148G>A) in GJB2] and Clouston syndrome in patients 2 and 3 [mutation p.Gly11Arg (c.31G>C) in GJB6]. Here, GJB2 is linked to KID syndrome.