Abstract: AbstractBackgroundPrevious population‐based studies on second primary cancers (SPCs) in urothelial cancers have focused on known risk factors in bladder cancer patients without data on other urothelial sites of the renal pelvis or ureter.AimsTo estimate sex‐specific risks for any SPCs after urothelial cancers, and in reverse order, for urothelial cancers as SPCs after any cancer. Such two‐way analysis may help interpret the results.MethodsWe employed standardized incidence ratios (SIRs) to estimate bidirectional relative risks of subseque...
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Topics: 
Urology
Oncology
Internal medicine