Interesting. I'm going to dig up the papers this is based on through my school's library as soon as I have time!
Medics are keen to find concrete physical evidence to help those children who feel they are trapped in the body of the opposite sex. One key brain region involved is the BSTc, an area of grey matter. But the region is too small to scan in a living person so differences have only been picked up at post-mortem. Read more >
Released just a few days ago and shared with me by my friend, Sara (thank you!):