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The role of neoadjuvant chemotherapy, lymph node dissection, and treatment delay in patients with muscle-invasive bladder cancer undergoing partial cystectomy.

Lenis AT, Fero KE, Ojeaburu L, Lec PM, Golla V, Brisbane W, Leapman MS, Chamie K. The role of neoadjuvant chemotherapy, lymph node dissection, and treatment delay in patients with muscle-invasive bladder cancer undergoing partial cystectomy. Urologic oncology. 2021 Aug 1; 39(8):496.e17-496.e24.

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Abstract:

OBJECTIVES: To investigate treatment patterns of partial cystectomy (PC), neoadjuvant chemotherapy (NAC), lymph node dissection (LND), and treatment delays, and the associations with overall survival (OS) among patients with muscle-invasive bladder cancer. PATIENTS AND METHODS: We identified patients with cT2-4cN0cM0 urothelial carcinoma of the bladder in the National Cancer Database who underwent PC from 2007 through 2015. We performed descriptive statistics and assessed temporal trends using the Cochrane-Armitage test. Our outcomes of interest were NAC, LND, and treatment delay defined as = 8 or = 12 weeks for patients who underwent NAC or upfront surgery, respectively. We used logistic regression and multivariable Cox proportional hazards models to evaluate predictors and associations with OS, respectively. RESULTS: A total of 9,199 patients met inclusion criteria. Over the study period, PC utilization decreased from 9% to 7% (P? = 0.06). Compared with patients who underwent radical cystectomy, patients treated with PC less frequently received NAC (7% vs. 17%, P < 0.01) and LND (57% vs. 91%, P < 0.01), but were less likely to experience treatment delays (25% vs. 31%, P < 0.01). Only 4.1% (27/655) of patients treated with PC received the combination of NAC, LND, and no treatment delay. In a Cox model, adequacy of LND was associated with improved OS ( < 10 nodes: HR 0.62, 95% CI 0.48-0.81 and = 10 nodes: HR 0.48, 95% Cl 0.32-0.72). CONCLUSION: PC is uncommon and associated with poorer utilization of NAC and LND, but fewer treatment delays. The adequacy of LND was associated with improved OS while NAC and treatment delay were not.





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