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A 15-year-old boy has been verbally and physically aggressive in home, school, and social settings on an almost daily basis for the last 7 years. The precipitants range from minor teasing by peers to perceived negative looks from his sister to simple parental reminders to do his homework. He is observed by others to generally be in an angry or irritable mood throughout the day. He does not currently meet criteria for a major depressive episode, although his history is suspicious for a past episode. He will have a several-hour period of elevated mood and hypertalkativeness about every 6 months. Which of the following is the most appropriate diagnosis at this time?
A. Cyclothymic disorder
B. Disruptive mood dysregulation disorder
C. Intermittent explosive disorder
D. Oppositional defiant disorder


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