Table 2.
Total score ranges in papillary urothelial tumors
| Dx | Mitosis | Thickness of layers | Atypia | Fused papilla | Total score |
|---|---|---|---|---|---|
| UP | 0–1 | 0 | 0 | 0 | 0–1 |
| IP | 0–1 | 0–1 | 0–1 | 1 | 1–3 |
| PUNLMP | 0–1 | 1–2 | 0 | 1 | 2–4 |
| LGPUC | 2 | 1–3 | 1 | 1 | 5–7 |
| HGPUC | 3 | 2–3 | 2 | 1 | 8–9 |
Atypia means hyperchromacia, irregular nuclear contours and prominent nucleoli.
UP Urothelial papilloma, IP inverted papilloma, PUNLMP papillary urothelial neoplasm low malignant potential, LGPUC low-grade papillary urothelial carcinoma, HGPUC high-grade papillary urothelial carcinoma