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Pathological characteristics and prognostic indicators of different histopathological types of urinary bladder cancer following radical cystectomy in a large single-center Egyptian cohort.
World Journal of Urology 2018 November
OBJECTIVE: To evaluate differences in pathological features and prognostics across four bladder cancer histopathological types: urothelial carcinoma (UC), urothelial carcinoma with variant histology (UCV), squamous cell carcinoma (SCC) and adenocarcinoma (ADC), utilizing a large cohort of radical cystectomy (RC) patients.
METHODS: A retrospective analysis of patients who underwent RC at a single institution in Egypt between 1997 and 2004 was performed. Kaplan-Meier and multivariable analyses were performed to evaluate the prognostic significance of pathological features including tumor stage, grade, lymphovascular invasion (LVI), and lymph node (LN) involvement in the different subtypes on disease-free survival (DFS).
RESULTS: 1238 patients (975 male, 263 female) were included, of whom 577 (47%) had UC, 174 (14%) UCV, 398 (32%) SCC, and 89 (7%) ADC. Median age was 54 (20-87) years and median follow-up was 40 months (0-110). There were significant differences in stage, grade, LVI, LN involvement, and presence of schistosomiasis across the subtypes (all p < 0.05). The prognostic significance of LVI was more evident in SCC (HR 2.14, p = 0.003) and ADC (HR 2.17, p = 0.044) than in UC (HR 1.66, p = 0.008). LN involvement was the strongest prognostic factor in UCV (HR 2.14, p = 0.012).
CONCLUSIONS: There are significant differences in clinicopathological features and their prognostic impact across bladder cancer subtypes. The prognostic significance of LVI is more evident in SCC and ADC, while LN involvement is more prognostic in UCV. Determining independent predictors in individual subtypes can guide multimodal treatment selection and clinical trial design.
METHODS: A retrospective analysis of patients who underwent RC at a single institution in Egypt between 1997 and 2004 was performed. Kaplan-Meier and multivariable analyses were performed to evaluate the prognostic significance of pathological features including tumor stage, grade, lymphovascular invasion (LVI), and lymph node (LN) involvement in the different subtypes on disease-free survival (DFS).
RESULTS: 1238 patients (975 male, 263 female) were included, of whom 577 (47%) had UC, 174 (14%) UCV, 398 (32%) SCC, and 89 (7%) ADC. Median age was 54 (20-87) years and median follow-up was 40 months (0-110). There were significant differences in stage, grade, LVI, LN involvement, and presence of schistosomiasis across the subtypes (all p < 0.05). The prognostic significance of LVI was more evident in SCC (HR 2.14, p = 0.003) and ADC (HR 2.17, p = 0.044) than in UC (HR 1.66, p = 0.008). LN involvement was the strongest prognostic factor in UCV (HR 2.14, p = 0.012).
CONCLUSIONS: There are significant differences in clinicopathological features and their prognostic impact across bladder cancer subtypes. The prognostic significance of LVI is more evident in SCC and ADC, while LN involvement is more prognostic in UCV. Determining independent predictors in individual subtypes can guide multimodal treatment selection and clinical trial design.
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