A 5-year-old girl is brought to the physician because her mother has found her to be inattentive at home and has received multiple complaints from her teachers at school. She does not complete her assignments and does not listen to her teachers' instructions. She refuses to talk to her parents or peers. Her mother says, “She ignores everything I say to her!” She prefers playing alone, and her mother reports that she likes playing with 5 red toy cars, repeatedly arranging them in a straight line. She avoids eye contact with her mother and the physician throughout the visit. Physical and neurological examination shows no abnormalities. Which of the following is the most likely diagnosis?
ARett syndrome
BConduct disorder
COppositional defiant disorder
DAttention deficit hyperactivity disorder
EAutism spectrum disorder
A mother brings her 3-year-old son to the doctor because she is worried that he might be harming himself by constantly banging his head on the wall. He has been exhibiting this behavior for a few months. She is also worried because he has started to speak less than he used to and does not respond when his name is called. He seems aloof during playtime with other children and seems to have lost interest in most of his toys. What is the most likely diagnosis?
AAutism spectrum disorder
BAttention deficit hyperactivity disorder
CGeneralized anxiety disorder
DBipolar disorder
EObsessive-compulsive disorder
A 10-year-old boy is brought to the physician by his parents because they are concerned about his “strange behavior”. The parents state that he has always been a lonely kid without many friends, but recently he has been having behavioral problems that seem to be unprovoked and are occurring more frequently. The child throws tantrums for no reason and does not respond to punishment or reward. He also has a “strange obsession” with collecting rocks that he finds on his way to and from school to the point where his room is filled with rocks. He plays alone in his room, lining the rocks up, organizing them by size, shape, or color, and he will randomly bark or make high-pitched noises without provocation. His teachers say he daydreams a lot and is very good at art, being able to recreate his favorite cartoon characters in great detail. On physical assessment, the patient does not make eye contact with the physician but talks incessantly about his rock collection. The child’s grammar and vocabulary seem normal but his speech is slightly labored, and he can’t seem to tell that the physician is not really interested in hearing about his rock collection. Which of the following is the most likely diagnosis?
AAutism spectrum disorder
BObsessive-compulsive disorder
CTourette’s syndrome
DPick disease
EAttention deficit hyperactivity disorder
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