During the last decades progress in classification of child and adolescent psychiatric disorder has mainly been reached considering the course of mental illness. On the other hand etiological approaches recurring on biological markers are fairly immature. Therefore the question of allowing combined diagnoses as already discussed on occasion of the AEP/WPA meetings in Vienna and Cairo is of continuous relevance. Suggestions are to be made for affective disorders of children, eating disorders of adolescents, multiple pervasive developmental disorder, the subtypes of conduct disorder and possible subtypes of enuresis. Following DSM phonological disorder should replace articulation disorder. Finally the idea of introducing categories of interaction disorder as proposed for DSM V has to be addressed.