Harvard Gazette article on the creation newly designed device that can help test treatments in patients with gliomas, a type of tumor that originates in the brain or spinal cord. This device is the shape and size of a grain of rice, and is designed to be used during standard of care surgery and can conduct dozens of experiments at once offering unprecedented insight into the effects of drugs on glioma tumor. From the team of Oliver Jonas and colleagues, first author Pierpaolo Peruzzi.