(1) analyzed the outcome of a series of Bacillus Calmette-Gurin (BCG)-treated non-muscle invasive bladder cancer (NMIBC) occurring after upper tract urothelial carcinoma (UTUC) in comparison to a "control" group of primary NMIBC. Their results, as well as the study concept itself, raise some intriguing issues on a quite controversial topic.
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Sanguedolce et al. (2018) studied this question.
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