Figure 2

Inverted papillary urothelial neoplasm of low malignant potential (Inverted PUNLMP). Inverted PUNLMP demonstrates inverted (endophytic) growth and resembles inverted papilloma, but in contrast, shows expanded and rounded cords and nests, composed of architecturally and cytologically bland urothelial cells (a and b). Inverted PUNLMP also lacks central streaming and peripheral palisading, as typically seen in inverted papilloma.