From the above-referred results, we concluded that some omissions have happened jeopardizing accuracy of the surgical staging in a significant way. In this way, in our environment the oncologist in charge of the treatment of Wilms tumor bearers, must establish a close integration with a surgical team, whose members have a precise understanding of the surgeon's importance and his fundamental role, not only of the surgical treatment itself, but who are aware on the minimal details on the surgical staging of this neoplasm, and of its importance in relation to the multidisplinary approach.