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The other possibility is that she has some kind of undiagnosed / untreated mental illness.
This has ethical implications as little is known about diagnosis in and treatment of these children, and they are often undiagnosed and untreated.
By now, I was convinced that Hayley had an undiagnosed , albeit mild, form of Asperger's syndrome.
Studies indicate that at least half of these go undiagnosed and, therefore, untreated.
Well, first of all, if you have an undiagnosed disease, you should see a physician and find out what's wrong.