I also know of two instances where the parents adopting Russian children weren’t told the true extent of their problems. Both stayed with their families, but the parents had to spend thousands of dollars to deal with the psychological issues (and in one instance, the parents were in fear for their lives, and the lives of their other children.)
It’s odd, because I have known families who have adopted Chinese children (from orphanages in China) and haven’t had this problem. Granted, not every Russian child has this disorder, but it does seem that Russian orphanages in particular seem to be good at producing it in a disproportionate number of their children.