What causes Peter Pan syndrome?

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Peter Pan syndrome is not listed in the Diagnostic and Statistical Manual of Mental Disorders, and is not recognized by the American Psychiatric Association as a mental disorder.
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Don't know what has been said before. Peter Pan felt sadly unable to be accepted by the adult world. As a defense, he rejected what he perceived to be rejecting him. He would hide whenever adults would come on the scene so that he would avoid interacting with them. Adults presented the ongoing threat of the emotional pain of rejection. Peter was just fearful and insecure with feelings of inadequacy to an extreme and defended against this thru avoidance of the potential cause. A fear of failure when interacting with others that he perceived to be more capable and in control than he was. Peter Pan syndrome means an overwhelming fear of failure interacting with those perceived to be more adequate which is defended against thru avoidance, that is all.
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Peter Pan syndrome, a desire to remain young and not face the responsibilities of youth, is the natural result of anyone who had a good childhood. The naive security of youth is looked upon fondly as an ideal state of being. Although the "condition," which is really just a state of mind, has gained a negative connotation in quasi-psychological use, it is actually a normal part of the post-adolescent mindset. If, however, the Peter Pan is to completely shun adult responsibility to the detriment of happiness or relationships, he can be said to be a "victim" of this syndrome. For more, see www.evanbailyn.com.