Inverted Papillary Uroth. CA, Low-Grade : Microscopic
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Comments:
Microscopic Features of Inverted Papillary Urothelial Carcinoma, Low-Grade: The tumor has a predominant (>80%) endophytic growth with striking resemblance to inverted urothelial papilloma. The lamina propria shows irregular, markedly thickened cords and trabeculae, large nests, as well as solid areas. The epithelial-stromal interface has smooth contours without invasion.