Comparison of TNM and Lugano staging systems in predicting 5-year survival rate of primary gastrointestinal lymphoma patients / 中国肿瘤临床

ABSTRACT

Objective:To assess the survival-predictive value of TNM and Lugano staging systems in patients with primary gastro-intestinal lymphoma (PGL). Methods:A total of 73 patients with PGL were recruited from February 2001 to August 2013. All patients were diagnosed according to the TNM and Lugano staging systems. Five-year survival rate was used as the major clinical outcome. Sur-vival curves were plotted using the Kaplan–Meier method and analyzed with the log-rank test. The prognostic value of different vari-ables for clinical outcomes was assessed using the Cox multiple regression model. Results:The median follow-up time of surviving pa-tients was 42.4 months (range1.3-158.6 months). The estimated 5-year overall survival rate was 77.82%. When diagnosed with the TNM system, the 5-year survival rates in stagesⅠ,Ⅱ,Ⅲ, andⅣwere 100%, 90.0%, 67.4%, and 22.2%, respectively (χ2=17.7956, P=0.0005). When staged by the Lugano system, the 5-year survival rates in stagesⅠ,Ⅱ,ⅡE , andⅣwere 100%, 100%, 70.7%, and 46.2%, respectively (χ2=15.6776, P=0.0013). Cox analysis showed that the invasion depth (T) (P=0.0181) and metastasis (M) (P=0.0031) were covariates that were prognostically significant for the overall survival. Conclusion:The TNM staging system is more ac-curate than the Lugano system in predicting the 5-year survival rate of patients with PGL.