The traumatism is historically a central notion in the field of the surgical medicine. With the claimss of victims' associations, it becomes a psychiatric syndrome. The psychoanalysis will endeavour throughout the last century to describe its functioning. It puts at the day order the responsibility of each traumatized subject in what happens to him. The event comes to reactivate a psychopathological process whose existence would be previous to the traumatic accident. But the general problem of the psychic traumatisme and of its interpretation (performance) still remains a reality nowadays. This clinical research, conducted among children and adolescents sick ( pediatric services) or wounded (pediatric surgery services), generalizes the psychopathology of the traumatism in the domain of pediatric somatic affections. It establishes a difference between a clinic of the dread and a clinic of anguish. The dread (or terror) associated with a mechanisme of sideration, rather occurs in the domain of corporal wounds, the anguish articulated with the repression is rather concerned after the annoncment of a serious disease, such as cancer