Partial nephrectomy in unilateral Wilms tumor. New draft for a protocol of the SIOP

: Unilateral Wilms' tumor has been treated according to 9301 SIOP protocol, with good results. The new pre protocol that SIOP is developing has a high inclusion rate. From 1993 to 1999, 11 patients with unilateral Wilms' tumor were treated in our center; in 6 cases preop chemotherapy was done, in the other 5 cases pre and postoperative chemotherapy were used. Nine of the 11 patients could be included in the pre protocol this was due to a thrombosis of the vena cava in one case, and in the other the middle renal in area was widely affected. Wilms' tumor has a good prognosis with the actual protocol, SIOP. New pre protocol could give a better quality of life due to the amount of functional renal parenchyma, without decreasing the actual high cure rate.