ArticleBMC cancer2025
Development and external validation of a FISH-clinical nomogram for predicting overall survival in bladder cancer patients after radical cystectomy.
Article in BMC cancer, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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11 authors.
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Abstract
backgroundBladder cancer has notable heterogeneity. The urine-based fluorescence in situ hybridization (FISH) test can detect bladder cancer noninvasively. In this study, we aimed to construct a nomogram based on FISH results and clinical features (referred to as the FISH-clinical model) to predict the overall survival (OS) of bladder cancer patients following radical cystectomy (RC).
methodsA total of 261 eligible patients were enrolled for this study. The SYSMH cohort was divided into training (n = 138) and internal validation (n = 70) sets; the SYSUTH cohort was used for external validation (n = 53). Multivariate Cox proportional hazards regression was applied for FISH-clinical model construction, and model performance was evaluated according to analyses of calibration, discrimination ability, and clinical usefulness.
resultsFISH-identified chromosome 7 and 17 aneuploidies correlated significantly with increased pT stage; the former was associated with lymph node metastasis. Six variables, age, tumor size, pT stage, lymphovascular invasion, chromosome 7 aneuploidy, and p16 locus loss, were found to be independent predictors of OS and were incorporated into our FISH-clinical model. The model demonstrated good calibration and discrimination, with C-indexes (95% CIs) of 0.772 (0.693-0.851), 0.712 (0.605-0.819) and 0.705 (0.587-0.822), in the training, internal validation and external validation sets respectively. Decision curve analysis demonstrated the model's clinical utility. Furthermore, all enrolled patients were successfully categorized into high-, medium- or low-risk groups, and stratified analyses were performed.
conclusionsPreoperative FISH has predictive value for OS, and we developed a FISH-clinical model for OS prediction in bladder cancer patients who have not received neoadjuvant chemotherapy or immunotherapy. This model showed favorable predictive efficacy with internal and external validation.
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