Synchronous UUTT and superficial bladder tumor are uncommon but 46% are invasive. Considering the possible examination of the upper urinary tract only in patients with tumor in the trigone or with multiple bladder tumors 41.4% or 69% of UUTTs, respectively, would have been diagnosed. Patients with tumor in the trigone are at almost 6-fold higher risk for a synchronous tumor in the upper urinary tract.
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