TACSTD2 and lung cancer: A univariable Cox regression analysis revealed that high TROP2 expression was associated with shorter lung cancer-specific (univariable hazard ratio [HR] = 1.60, 95% confidence interval [CI] = 1.07–2.44, P = 0.022) and overall survival (univariable HR = 1.49, 95% CI = 1.06–2.13, P = 0.021).