1. A Single Institution Experience in the Management of Localized Neuroendocrine Carcinoma of the Bladder.
- Author
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Liveringhouse C, Sim AJ, Zhang J, Jain RK, Naidu SU, Linkowski L, Zemp LW, Yu A, Sexton WJ, Spiess PE, Gilbert SM, Poch MA, Pow-Sang J, Li R, Manley BJ, Vosoughi A, Dhillon J, Xu H, Torres-Roca JF, Johnstone PAS, Yamoah K, and Grass GD
- Abstract
Background: Neuroendocrine carcinoma of the bladder (NEC-bladder) is a rare disease with poor outcomes and variable treatment approaches., Materials and Methods: Patients with localized NEC-bladder treated with surgery or radiation between 2001-2021 were retrospectively identified. Rates of pathologic complete response (pCR) and downstaging were evaluated following NAC in surgically-treated patients. Progression-free survival (PFS) and overall survival (OS) were analyzed with univariable (log-rank) and multivariable (MVA; Cox regression) methods., Results: Sixty-five patients were identified having a median age of 73. The tumor histology distribution was small cell (64.6%) or urothelial with NE differentiation (35.4%). Most patients (69.2%) received NAC. Patients received local therapy by surgery (78.5%) or chemoradiation (21.5%). The majority (62.7%) of surgical patients had ≥ pT2 with 37.3% having nodal involvement (pN+). The pCR and downstaging rates were 21.6% and 35.1%, respectively. At a median follow-up of 60 months (m), the median PFS and OS were 16.4m and 25.9m, respectively. NAC improved PFS (p=0.04) and downstaging improved PFS (p=0.012) and OS (p<0.001). Patients receiving NAC with ypN0 vs. ypN+ had median OS of 69.9m vs 15.3m, respectively (p<0.001). MVA identified receipt of NAC and pN as predictors of PFS; pN was predictive of OS. No differences in PFS or OS were seen between histology of primary tumor. The brain metastasis rate was 10.8% with all patients having small cell histology., Conclusions: Optimized therapy in NEC-bladder includes NAC followed by local consolidation. Ascertainment of ypN0 is associated with long term survival, while pN+ remains associated with poor outcomes., Competing Interests: Disclosure Austin Sim: leadership role (ASTRO non-voting member board of directors). Jingsong Zhang: honoraria (Seagen); participation on Data Safety Monitoring Board (Seagen). Philippe E. Spiess: NCCN panel member for bladder and penile cancer. Roger Li: research support (predicine; veracyte; CG oncology; Valar Labs; Merck); clinical trial protocol committee (CG oncology; Merck; Janssen); Scientific advisor/consultant (Bristol Myers Squibb; Merck, Fergene, Arquer Diagnostics, Urogen Pharma, Lucence, CG Oncology, Janssen, Thericon); Honoraria (SAI MedPartners, Solstice Health Communications, Putnam Associates, UroToday). Javier F. Torres-Roca: intellectual property (RSI) and stock in Cvergenx . G. Daniel Grass: research support (ArteraAI). All other authors state that they have no conflicts of interest., (Copyright © 2024 Elsevier Inc. All rights reserved.)
- Published
- 2024
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