Another study, investigating whether a common polymorphism (×579G>T: rs1569686) in the promoter of the DNMT3B gene increases the risk to develop thymomatous MG, found a statistically significant association of the DNMT3B-579T allele and the TT homozygous genotype with the risk of TEN [41]. The gene discussed is DNMT3B; the disease is myasthenia gravis.