Marco
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Not a lot of detail in this story (or in the linked abstract) but interesting nonetheless :
Evidence of autism shows up in the brain's blood vessels, study finds
http://www.sciencealert.com/evidence-of-autism-can-be-found-in-the-brain-s-blood-vessels-study-finds
Persistent Angiogenesis in the Autism Brain: An Immunocytochemical Study of Postmortem Cortex, Brainstem and Cerebellum
http://link.springer.com/article/10.1007/s10803-015-2672-6
Evidence of autism shows up in the brain's blood vessels, study finds
"In a typical brain, blood vessels are stable, thereby ensuring a stable distribution of blood," she adds. "Whereas in the autism brain, the cellular structure of blood vessels continually fluctuates, which results in circulation that is fluctuating and, ultimately, neurologically limiting."
http://www.sciencealert.com/evidence-of-autism-can-be-found-in-the-brain-s-blood-vessels-study-finds
Persistent Angiogenesis in the Autism Brain: An Immunocytochemical Study of Postmortem Cortex, Brainstem and Cerebellum
We found significant increases in both nestin and CD34, which are markers of angiogenesis localized to pericyte cells and endothelial cells, respectively.
http://link.springer.com/article/10.1007/s10803-015-2672-6