Snapshot A 3-year-old boy is brought to his pediatrician by his mother due to abnormal behavior. She reports that he does not appear to respond to affection, does not look her in the eyes, and constantly lines up his toys. He becomes agitated when she tries to take him away from his toys or if the mother cooks a different meal for dinner. On physical examination, he does not respond to questions and is distracted by the texture of the exam-table cloth. Introduction Clinical definition login to view 11 more bullets Epidemiology Demographics login to view 1 more bullet Risk factors login to view 1 more bullet ETIOLOGY Pathogenesis login to view 2 more bullets Associated conditions login to view 4 more bullets Presentation Symptoms login to view 1 more bullet Differential Language disorder Obsessive compulsive disorder Rett syndrome (this occurs almost exclusively in girls) Reactive attachment disorder login to view 6 more bullets DIAGNOSIS DSM V criteria login to view 12 more bullets Treatment Conservative login to view 3 more bullets Medical login to view 6 more bullets Prognosis Difficult to determine in early childhood and depends on many factors