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MMLU / A 32-year-old man comes to the physician because he has had difficulty focusing…

Problem

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question

A 32-year-old man comes to the physician because he has had difficulty focusing on tasks at work and at home during the past 2 months. He works as an automobile mechanic. He has had a lot of energy for work but often is distracted to the point that he does not complete assigned tasks. He frequently stops working on his own tasks to attempt to develop greater efficiency in his shop. He states that he is delighted with his newfound energy and reports that he now needs only 4 hours of sleep nightly. He has no history of psychiatric illness. He always performed well in school. He has a history of drinking alcohol excessively and using methamphetamines and cocaine during his 20s, but he has not consumed alcohol or used illicit drugs for the past 3 years. His temperature is 37°C (98.6°F), pulse is 60/min, and blood pressure is 125/80 mm Hg. Physical examination shows no abnormalities. On mental status examination, he describes his mood as "good." He has a labile affect. His speech is rapid in rate but normal in rhythm, and his thought process is organized. Short- and long-term memory are intact. Attention and concentration are fair; he makes no errors when performing serial sevens, and he can repeat seven digits forward and five in reverse sequence. He has had no delusions or hallucinations. Which of the following is the most likely diagnosis?

choices

  1. Antisocial personality disorder
  2. Attention-deficit/hyperactivity disorder
  3. Bipolar disorder
  4. Borderline personality disorder

subject

professional_medicine

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