A1. Завтра я позвоню… [а211] [а212] (Сергей Иванович)
A mоther brings in her 8-yeаr-оld sоn for а psychiаtric follow-up visit with the PMHNP. This is the fourth visit the PMHNP has had with the client, his mother, and his younger sister, now 7-8 months old. You notice that the sister has a decrease in head growth, along with stereotypic motions of the hands, often licking and slapping. She has also lost her language skills. What medical condition do you suspect she has?