It's too bad this article didn't get more discussion. The circumvention of the blood brain barrier is a <i>big deal</i>. I wish someone more knowledgable than me had a go at explaining the implications.
It's nothing short of astonishing (and, quite frankly, embarrassing) that a macroscopic structure has eluded doctors for the past couple centuries. One can wonder how many other macroscopic structures exist inside every human being.