[Attention deficit hyperactivity disorder in adult].

This study explores the clinical presentation, neurobiological basis and therapeutic approaches of attention deficit hyperactivity disorder (ADHD) through the case of an adult who had not previously been diagnosed. Since childhood, the patient presented with symptoms suggestive of mixed ADHD, combining inattention, agitation, impulsivity and addictive comorbidity. Clinical and neuropsychological assessment has documented a typical picture. Recent data from the literature, particularly on the dysregulation of mesocortical and mesolimbic dopaminergic pathways, shed light on the underlying mechanisms. An integrated pharmacological and non-pharmacological treatment plan is proposed, tailored to the specific needs of the adult patient.