A big reason that brain tumors are as deadly as they are is the inability of meds to penetrate the blood-brain barrier. Various methods have been tried to open up access for chemotherapy into the brain, but we’re finally seeing something that’s quite promising. Following a tiny study on four patients we reported on a couple years ago, clinicians in Paris, France have successfully tested an ultrasound implant from on a much larger patient group to see how well it’s tolerated.