Papillary urothelial neoplasm of low malignant potential (PUNLMP)

At low power (A, 20x), the discrete and slender papillae of PUNLMP are lined by a thickened multilayered urothelium with absent cytologic atypia. At high power (B, 40x), the cell density is increased compared to normal urothelium. The cell polarity and the umbrella cell layer are preserved.