High-grade ureteroscopic biopsy is associated with advanced pathology of upper-tract urothelial carcinoma tumors at definitive surgical resection.
Clements T, Messer JC, Terrell JD, Herman MP, Ng CK, Scherr DS, Scoll B, Boorjian SA, Uzzo RG, Wille M, Eggener SE, Lucas SM, Lotan Y, Shariat SF, Raman JD. High-grade ureteroscopic biopsy is associated with advanced pathology of upper-tract urothelial carcinoma tumors at definitive surgical resection. J Endourol. 2012 Apr; 26(4):398-402.