More specifically, median (IQR) serum value of IL-6 was 17.2 pg/mL (8.5–36.8 pg/mL) in the uncomplicated PAA group and was 60.25 pg/mL (27.1–169 pg/mL) in the complicated PAA group (P < 0.001). The gene discussed is IL6; the disease is pulmonary artery-aorta diameter ratio measurement.