Fig. 1

a, b Abdominal computed tomography scan demonstrating the volume of renal pelvic tumor before treatment (a), and the decrease in volume after two cycles of fluorouracil, leucovorin, oxaliplatin, and irinotecan (b). c, d The rectal cancer before treatment (c), and decrease in tumor volume after two rounds of fluorouracil, leucovorin, oxaliplatin, and irinotecan (d). Red arrows indicate the sites of the tumor