Non-invasive low-grade papillary urothelial carcinoma (LGPUC)

At low power (A, 20x) LGPUC papillary fronds show frequent branching and minimal fusion. At higher power (B-C, 40x) the urothelial cells maintain an overall orderly appearance with easily recognizable variations in cytologic features. The nuclei are enlarged; mild differences in shape, contour, and chromatin distribution are noted.