In recent years, genetic variations in non-HLA genes such as the endoplasmic reticulum aminopeptidase enzyme (ERAP1), interleukin-10 (IL-10), and interleukin-23 receptor/interleukin-12 receptor beta-2 (IL23R/IL-12RB2) have been identified as susceptibility loci for BD [4]. The gene discussed is ERAP1; the disease is Behcet disease.