1. Histologic Grading of Noninvasive Papillary Urothelial Neoplasms
Gregory T. MacLennan, Ziya Kirkali, Liang Cheng 
European Urology 
Volume 51, Issue 4, Pages (April 2007)
DOI: /j.eururo
Copyright © 2006 European Association of Urology Terms and Conditions

2. Fig. 1
Histologic grading of urothelial tumors. (A) Papillary urothelial neoplasm of low malignant potential (PUNLMP), formerly 1973 World Health Organization (WHO) grade 1 urothelial carcinoma; (B) low-grade urothelial carcinoma, formerly 1973 WHO grade 2 urothelial carcinoma; and (C) high-grade urothelial carcinoma, formerly 1973 WHO grade 3 urothelial carcinoma.
European Urology  , DOI: ( /j.eururo )
Copyright © 2006 European Association of Urology Terms and Conditions

3. Fig. 2
Comparison of the 1973 and 2004 WHO grading system. The 1973 WHO grade 1 carcinomas are reassigned, some to the PUNLMP category, and some to the low-grade carcinoma category. Similarly, 1973 WHO grade 2 carcinomas are reassigned, some to the low-grade carcinoma category, and others to the high-grade carcinoma category. All 1973 WHO tumors are assigned to the high-grade carcinoma category. WHO=World Health Organization; PUNLMP=papillary urothelial neoplasm of low malignant potential.
European Urology  , DOI: ( /j.eururo )
Copyright © 2006 European Association of Urology Terms and Conditions