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Background   Pathology of urothelial carcinoma may vary in different populations at diagnosis. Our aim was to evaluate the histopathologic differences between Jewish and Arab patients in Israel at first diagnosis of urothelial cancer.Patients and Methods   We retrospectively collected data of all patients with confirmed urothelial cancer, treated at our department between January 2010 and January 2015. We examined the distribution of the histopathologic data among the studied populations. To compare the categorical variables we used the Chi-Square Pearson test. Comparison of independent variables was made by Student's  t -test.  P  value below 0.05 was considered significant.Results   The study group included 413 patients, 345 Jews and 68 Arabs. The major differences were that Arab patients were younger (62.61 versus 68.55 years,  P  = 0.001), had more aggressive tumors that were detected at a more advanced stage, and had also a higher rate of metastatic disease (7.4% versus 3.2%,  P  = 0.05). Nonurothelial cell tumors were 2.3 times more prevalent in Arab population. Unlike Jewish population, Arab women had higher rate of invasive/metastatic disease compared with Arab men (40% versus 22.4%).Conclusion   At time of diagnosis the tumors were more aggressive in Arab patients, especially in Arab women. The reasons for those differences constitute a target for a separate research. These results should have an impact on prevention medicine and education of physicians treating mixed populations.

Histopathologic Differences between Jewish and Arab Population in Israel at First-Time Presentation with Bladder Cancer