PMID: 8588726Dec 1, 1995Paper

Synchronous manifestation of bladder inverted papilloma and transitional carcinoma of the renal pelvis

Archivos españoles de urología
J G Pereira AriasC Bernuy Malfaz

Abstract

To review briefly the histological and biological aspects of inverted papilloma and to determine whether it is a benign tumor or low-grade malignant lesion. We report a patient with synchronous presentation of bladder inverted papilloma and renal pelvis transitional cell carcinoma. After endoscopic resection of the bladder tumor and left ureteral meatus, a radical nephroureterectomy was carried out with success. The clinical features, diagnostic and therapeutic aspects are briefly reviewed. Inverted papilloma accounts for 2.2% of all urothelial tumors; the bladder is most commonly involved. It is frequently a single lesion with endophytic growth pattern. The clinical significance remains a controversy. Most investigators consider them as benign neoplastic tumors, although in one third of the patients it may be associated with synchronous urothelial carcinomas, implying a malignant condition. Therapeutic management and follow-up are emphasized.

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