Differential Analysis of Surgical Treatment Modalities in T2N0M0 Bladder Cancer Patients: A Novel Propensity Score-Based Cohort Study

Abstract

Objective

This study explored prognostic differences between radical cystectomy (RC), tri-modality treatment (TURBt combined with radiotherapy and chemotherapy, TMT), electrocautery (EC) and partial cystectomy (PC) for T2N0M0 MIBC.

Materials and Methods

Using SEER data (2004-2015, 2018-2020), we identified T2N0M0 MIBC patients treated with RC, TMT, EC, or PC. Propensity score matching (PSM, 1:1, caliper=0.1) minimized confounding. Kaplan-Meier analysis and Cox regression identified independent prognostic factors, stratified by tumor size and age.

Result

This study included 6526 patients with T2N0M0 MIBC. Among them, 348(5.33%) underwent PC, 309(4.73%)underwent EC, 1833(28.09%)received TMT, and 4036(61.84%) RC. After 1:1 propensity score matching, RC showed improved CSS (HR=0.67, 95%CI 0.47-0.95 , and PC also benefited (HR=0.97, 95%CI 0.69-1.36) compared to EC. While TMT showed a worse end (HR=1.41, 95%Cl 1.03-1.92) compared to EC. Cox analysis was used to stratify tumor size and age for subgroup analysis. Results for tumor size subgroups were aligned with PSM findings. In the age-stratified subgroups, patients aged <67 years, both RC (HR=0.54, P=0.107) and TMT(HR=0.91, P=0.785) showed better prognoses compared to EC treatment, while PC treatment showed worse prognoses compared to EC treatment (HR=1.23, P=0.542).; for 68-77 years, RC(0.64, P=0.1436) and PC(HR=0.46, P=0.0283)had advantages, and PC is more recommended. For >78 years, RC had superior CSS over EC and PC, whereas TMT had the poorest prognosis.

Conclusion

In clinical T2N0M0 MIBC, overall, RC outperformed focal-tumor therapy and PC, irrespective of tumor size. However, considering age, we recommend PC treatment for patients aged 68-77 and EC for those aged >78 years.