MSFinals-5345
A 42-year-old man is brought to the Emergency Department by his friends. He holds a senior trading job in an investment bank and has a history of recurrent admissions following cocaine intoxication. They are worried because he recently sent a memo to everyone on the trading floor suggesting that he is now the lead, he has the mental capacity to beat anyone to a higher profit and he should be chairman of the group. In fact, he has been performing poorly and has missed recent performance targets.
Which of the following is the most likely diagnosis?