Deafness, Autosomal Recessive 26, Modifier of, also known as deafness, nonsyndromic, modifier 1, is related to contractures, pterygia, and spondylocarpotarsal fusion syndrome 1a and deafness, autosomal recessive 2. An important gene associated with Deafness, Autosomal Recessive 26, Modifier of is METTL13 (Methyltransferase 13, EEF1A N-Terminus And K55).