Does clinically relevant psychopathology in adolescents necessarily require treatment or does it "grow out"?

Psychodynamic therapy led to a significant symptom reduction in treated adolescents and was superior to development-related symptom changes occurring in the two control groups. Hence, clinically relevant symptoms in adolescents do not "grow out", but require psychotherapeutic treatment. Differences between adolescents and their parents in the evaluation of symptom severity and change require attention in psychotherapy treatment and research.