Snapshot A 4-year-old boy presents to your office brought in by his parents. They are concerned as he has no interest in interacting with his brother and demonstrates little to no interest in his mother or father. The child knows only 10 words and his mother grows teary as she describes that he will not respond by hugging her when she tries to hug him. The child spends most of his time stacking cans and organizing them by color in the kitchen pantry. Introduction Overview login to view 6 more bullets Epidemiology login to view 5 more bullets Pathogenesis login to view 1 more bullet Associated conditions login to view 4 more bullets Prognosis login to view 4 more bullets Presentation Symptoms login to view 7 more bullets Physical exam login to view 13 more bullets Differential Language disorder login to view 3 more bullets Rett syndrome login to view 4 more bullets Treatment Lifestyle login to view 4 more bullets Medical login to view 3 more bullets