Fig. 1From: Photodynamic diagnostic ureteroscopy using the VISERA ELITE video system for diagnosis of upper-urinary tract urothelial carcinoma: a prospective cohort pilot studyTwo different white light negative and ALA-PDD positive lesions using flexible URS (URS-P6, a) and semi-rigid ureteroscopy (Slim line, b) followed by diagnosis with carcinoma in situBack to article page