A pre-teen client has been considered a neighborhood bully for several years. Peers avoid him, and the mother says she cannot believe a thing he tells her. Recently, the client was observed shooting at several dogs with a pellet gun and setting fire to a vacant lot for the first time. A nurse would assess these behaviors as being most consistent with which disorder?

Conduct disorder represents a repetitive neurobiological pattern of violating the basic rights of others and major societal norms. Diagnostic criteria include aggression toward animals, destruction of property, deceitfulness, and serious rule violations often emerging before age 15. Rationale: A. Oppositional defiant disorder involves irritability and argumentative behavior toward authority figures. However, it lacks the severe physical aggression, animal cruelty, or intentional property destruction that characterizes the more serious clinical presentation of conduct disorder in children. B. Pyromania involves deliberate and repeated fire-setting due to an internal tension or arousal. The client set a fire, but this is only one component of a broader pattern of antisocial behaviors and aggression noted in the assessment. C. Defiance of authority is a behavioral symptom rather than a clinical psychiatric diagnosis. The nurse must identify a formal cluster of symptoms that meet the diagnostic criteria found in the DSM-5 for a psychiatric developmental disorder. D. Conduct disorder is defined by a pattern of callous behavior including bullying, animal cruelty, and lying. The client’s transition from bullying to destructive acts like arson and shooting animals is the hallmark evidence for this specific clinical diagnosis.