Simultaneous occurrence of multifocal urothelial carcinoma (UC) and ipsilateral renal cell carcinoma (RCC) is rare. We report a 67-year-old woman with multifocal, infiltrating urothelial carcinoma and unilateral renal cell carcinoma. She was referred to our department because of painless gross hematuria. Cystoscopy, computed tomography and retrograde pyelography studies revealed bladder, bilateral renal and ureter UC. She was treated with transurethral resection of the bladder tumor followed by bilateral nephroureterectomy. The pathological diagnosis was high-grade UC over the bladder and both renal pelves and ureters. A second tumor in the upper pole of the right kidney was reported as clear cell RCC. The patient was alive and still under careful surveillance at this writing.
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