“While the diagnostic categories of DSM-III and DSM-IV (and soon DSM-5) have provided the basis for much useful research, little has been written about how much of the DSM—and how much “evidence-based medicine”—is built on a foundation of fantasy. The DSM itself, unfortunately, does not acknowledge the importance, or existence, of fantasy. If it did, it would be a much more scientifically based, useful resource.”

http://www.psychologytoday.com/blog/beyond-freud/201304/dsm-fantasies