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Urothelial Papilloma
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- Comprises 2--3% of papillary urothelial tumors
- Clinical: patients are typically younger than 50 years; papillomas are small, usually unifocal lesions, may present with hematuria; often recur and may be associated with invasive TCC in up to 10% of patients
- Histologic features:
- delicate fibrovascular stalk(s) covered by normal-appearing urothelium containing 5-7 cell layers (no increase in thickness of the urothelium, in other words)
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