A new discovery that will change textbooks forever: Previously it was thought that these vessels were absent in the brain, as they hadn’t been found. However, now scientists have discovered through the use of live imaging that there exist lymphatic vessels within the brain. The vessels were located very close blood vessels, which might have been the reason why they have been missed – until now.

http://www.neuroscientistnews.com/research-news/missing-link-found-between-brain-immune-system-major-disease-implications

If you have access, be sure to check out the Nature publication on their website: http://www.nature.com/nature/journal/v523/n7560/full/nature14432.html