(A) Kaplan–Meier (KM) plot for the propensity-matched patients. (B) KM plot for the propensity-matched patients by anesthesia type and American Society of Anesthesiologists (ASA) groups. (C) KM plot for the propensity-matched patients by anesthesia type and metastasis status. INHA = volatile inhalational; no-MET = no detected metastases; TIVA = total IV anesthesia; yes-MET = known metastases at the time of surgery.