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The Oncological Impact of Complete Transurethral Resection Before Neoadjuvant Chemotherapy in Muscle-Invasive Bladder Cancer

Title
The Oncological Impact of Complete Transurethral Resection Before Neoadjuvant Chemotherapy in Muscle-Invasive Bladder Cancer
Type
Thesis
Year
2024-06-03
Authors
Inês Coutinho Barbosa Baptista
(Author)
FMUP
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Scientific classification
FOS: Medical and Health sciences
Other information
Resumo (PT): Introdução A resseção transuretral completa dos tumores da bexiga tem um papel bem estabelecido no cancro não musculo-invasivo da bexiga. Contudo, no cancro musculo-invasivo da bexiga existe falta de evidência quanto à sua importância previamente à quimioterapia neoadjuvante. Material e métodos Os dados de pacientes com carcinoma musculo-invasivo de bexiga submetidos a quimioterapia neoadjuvante e cistectomia radical adquiridos de um centro hospitalar terciário foram retrospetivamente analisados entre março de 2010 e novembro de 2022. Os pacientes com resseção completa do tumor (RTU-Vc) foram comparados àqueles com ressecção incompleta (RTU-Vi). O objetivo primário do estudo foi avaliar o impacto da RTU-Vc na resposta patológica do tumor. Secundariamente, foi também avaliado o seu efeito na sobrevida e nos outcomes oncológicos. Resultados 37 pacientes foram incluídos neste estudo, sendo o regime de quimioterapia neoadjuvante idêntico entre eles. O grupo RTU-Vc demonstrou uma taxa mais alta de downstaging (11 casos, 50%) em comparação com o grupo RTU-Vi (2 casos, 13,3%), p=0,022. Durante a média de 49 meses de seguimento, a sobrevida global (86.4% vs. 40%, p=0.005), a sobrevida livre de recorrência (81.8% vs. 46.7%, p=0.036) e a sobrevida específica ao cancro (90.9% vs 60%, p=0.042) mostraram-se mais altas no grupo RTU-Vc. Para além disso, observaram-se significativamente menos recidivas, taxas de sobrevida mais altas e uma incidência reduzida de óbitos relacionados com doença neoplásica em pacientes que experienciaram downstaging. Conclusão A ressecção transuretral completa de tumores da bexiga em pacientes com carcinoma musculo-invasivo da bexiga previamente à quimioterapia neoadjuvante tem um impacto favorável no downstaging da doença a nível patológico e nos desfechos oncológicos e de sobrevida.
Abstract (EN): Introduction Complete transurethral resection of bladder tumour has a clear role in non-muscle invasive bladder cancer neoplasm. However, there is a lack of evidence as to whether a complete resection is essential before neoadjuvant chemotherapy (NAC) in muscle invasive bladder cancer (MIBC). Material and methods Tertiary centre data from patients with MIBC submitted to NAC and radical cystectomy between March 2010 and November 2022 was retrospectively analysed. Patients with a complete resection (cTURBT) before NAC were compared to those with incomplete (iTURBT). The primary objective was to assess the impact of cTURBT on pathologic response. Survival and oncologic outcomes were also analysed. Results Thirty-seven patients were included in this study. NAC regime was identical between groups. cTURBT group demonstrated a higher rate of downstaging (11 cases, 50%) compared to the iTURBT group (2 cases, 13.3%, p = 0.022). During the mean 49 month of follow-up period, overall survival (86.4% vs. 40%, p=0.005), recurrence-free survival (81.8% vs. 46.7%, p=0.036) and cancer-specific survival (90.9% vs 60%, p=0.042) were higher in the cTURBT group. Furthermore, we observed significantly fewer relapses, higher survival rates, and lower oncological-related deaths in patients who exhibited downstaging. Conclusion Complete transurethral resection of bladder tumour demonstrated a favourable impact on patients with MIBC undergoing NAC, as it enhances pathologic downstaging and improves survival outcomes.
Language: English
No. of pages: 44
License type: Click to view license CC BY-NC-ND
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