Effectiveness of preoperative chemotherapy and radical cystectomy in clinically node-positive and node-negative bladder cancer patients
摘要
Preoperative chemotherapy (POC) combined with radical cystectomy (RC) is the standard treatment for clinically node-negative (cN0) bladder cancer (BC), but its role in clinically node-positive (cN+) disease remains uncertain. We investigated whether POC + RC improves outcomes in cN+ patients by assessing whether the survival gap between cN0 and cN+ patients is smaller than that historically observed in RC-only cohorts. We also evaluated whether radiographic nodal response predicts prognosis.
Materials and methodsWe retrospectively analyzed patients with T2-4N0M0 or T1-4N + M0 BC who underwent POC + RC at our institution between 1999 and 2019. Recurrence-free survival (RFS) and cancer-specific survival (CSS) were compared between the cN0 and cN+ groups using Cox regression analysis. The hazard ratios (HRs) for cN+/cN0 survival in our cohort were then compared to published HRs from the largest RC-only series, adjusted for clinical rather than pathological nodal staging (non-inferiority margins: HR 2.19 for RFS, HR 2.39 for CSS).
ResultsAmong 142 patients (73 cN0, 69 cN+), 5-year RFS was 68% in both groups. The HR for recurrence in cN+ versus cN0 patients was 1.10 (95% Confidence interval [CI] 0.67–1.80), significantly lower than the RC-only benchmark (HR 2.19), demonstrating non-inferiority and suggesting the benefit of POC in cN+ disease. For CSS, 5-year rates were 80% (cN0) and 70% (cN+); the HR was 1.64 (95% CI 0.92–2.92), not significantly lower than the RC-only margin (HR 2.39). Among 72 cN+ patients with radiographic nodal assessment, complete or stable nodal response predicted superior RFS and CSS (p < 0.001 for both). Pathological downstaging (p = 0.03) and mean lymph node density (p = 0.043) were also significantly better in clinical responders.
ConclusionCompared with RC alone, POC + RC narrows the survival gap between cN+ and cN0 patients, supporting its use in cN+ disease. Radiographic nodal response is a robust preoperative predictor of survival and may inform treatment decisions.