Quality assessment of oncological studies is mandatory. The German Cancer Society (Deutsche Krebsgesellschaft) and its affiliated organizations attained the mayer role for such purposes. The present paper demonstrates that the Association of Urological Oncoloy (AUO), which is part of the German Cancer Society, became the most widely accepted and integrative workinggroup on urogenital cancers in Germany (97 studies). The AUO does not only provide the largest public data base on urogenital cancer studies (65 items, http: www.auo-online.de) - with 18 open studies presented in the paper - but also serves as the principal driving force for interdisciplinary urogenital cancer networks and international intergroup activities (AUO/EORTC).