A new peer-reviewed study conducted in Japanese universities has found a way to diagnose early-stage brain cancer or brain tumors with a urine sample. The nano-technological device, created by Yasui and Professor Yoshinobu Baba of Nagoya University’s Graduate School of Engineering, Nagoya University’s Institute of Innovation for Future Society, and the University of Tokyo, can be used to identify proteins in EVs, CD31, and CD63 (which are in brain tumors and the urine of people with them).