The AAA patient cohort was divided into four groups based on the HMGB2quartiles: group Q1, HMGB2 <1.35 ng/mL; group Q2, 1.35 ≤ HMGB2 < 4.36ng/mL; group Q3, 4.36 ≤ HMGB2 < 9.97 ng/mL; group Q4, HMGB2 ≥9.97ng/mL. The gene discussed is HMGB2; the disease is triple-A syndrome.