MAOB and pharynx cancer: Compared to the healthy control group (MAOB (rs6324) A-allele), the MAOB (rs6324) risk G-allele was significantly related to the risks of oral cavity and pharynx cancers (AOR = 13.00, 95% CI = 7.35–22.98) and OPMD (AOR = 37.45, 95% CI = 11.94–117.46).