TACSTD2 and lung cancer: A univariable Cox regression analysis revealed that high TROP2 expression was associated with longer lung cancer-specific (univariable HR = 0.23, 95% CI = 0.037–0.74, P = 0.0096) and overall survival (univariable HR = 0.50, 95% CI = 0.21–1.02, P = 0.057).