Fig. 1

K-M Survival Analysis (A. significant differences in survival curves for age (< 41.5 years) (p = 0.0003); B. significant differences in survival curves for hypertension as a comorbidity(p = 0.014); C. significant differences in survival curves for previous history of recurrence (p < 0.0001); D. no significant differences in survival curves for family history of hypertension (p = 0.2); E. significant differences in survival curves for bilateral tumors (p = 0.0037); F. significant differences in survival curves for tumor size (≥ 11.25 cm) (p = 0.0032); G. significant differences in survival curves for the number of episodes of intraoperative hemodynamic instability ≥ 8 (p = 0.013); H. no significant differences in survival curves for instability minutes (≥ 12.5 min) (p = 0.33))