1. International Society of Urological Pathology Grading and Other Prognostic Factors for Renal Neoplasia 
Brett Delahunt, John R. Srigley, Lars Egevad, Rodolfo Montironi 
European Urology 
Volume 66, Issue 5, Pages (November 2014)
DOI: /j.eururo
Copyright © 2014 European Association of Urology Terms and Conditions

2. Fig. 1
The International Society of Urological Pathology grading classification for renal cell carcinoma: (a) grade 1, (b) grade 2, (c) grade 3, (d–f) grade 4.
European Urology  , DOI: ( /j.eururo )
Copyright © 2014 European Association of Urology Terms and Conditions