Univariate survival analyses using the Kaplan–Meier method with log-rank testing identified atypical carcinoid histology, presence of necrosis, elevated Ki-67 index, visceral pleural invasion, administration of adjuvant somatostatin analog (SSA) therapy, and pathological lymph node upstaging as predictors of worse RFS (all p < 0.05). The gene discussed is MKI67; the disease is carcinoid tumor.