He was also positive for a rare homozygous missense (c.22G>C [GenBank: NM_173477.5] [p.Ala8Pro]), classified as a variant of uncertain significance (VUS) in ClinVar: 1687494, in USH1G, a gene linked to Usher syndrome type I (MIM: 606943). This evidence concerns the gene USH1G and Usher syndrome type 1.