摘要: Many children are referred to the psychiatrist with title of "difficult child". Behind that popular and nonscientific description hide several major psychiatric syndromes, such as attention-deficit hyperactivity disorder, disruptive behavior disorders, mood disorders posttraumatic stress disorder. This article reviews different clinical faces these their differential diagnoses, comorbidity prognosis. These very prevalent have long-term consequences on process development child. Acquaintance early diagnosis treatment can prevent complications improve