Brain scans done on groups of men with autism show distinct differences in both the volume of specific regions and the activity of cells that signal a possible immune response, two new studies suggest. Scientists in England and Japan used MRI and PET (positron emission tomography) scans to examine brain-based anatomical and cellular variations in those with autism. But the disparities -- while offering a deeper glimpse into the little-understood developmental disorder -- raised more questions about its cause and treatment that only further research can answer.
