We usually think of autism as being a childhood disorder because it is typically talked about in kids. Nowadays, children are screened for the signs of autism by their pediatricians during their 18- and 24-month well checks. This means that most cases of autism will have been identified by the time a child is two years of age. But, this screening procedure is fairly recent, so what if you are an adult who was told you had a learning disorder years ago or were called a “difficult” child before this protocol? Is it possible that you may have undiagnosed autism spectrum disorder (ASD), even if your symptoms are mild?