[Angiographic embolization of renal tumors (author's transl)].

The authors present their experience with 38 cases of renal tumors which had angiographic embolization. Embolization is electively indicated as a preoperative procedure: the 4 divided by 5 days time lapse before the operation give rise to tissue modifications which permit a better resectability of the mass. Thus embolization achieves a good demarcation of the neoplastic mass from the surrounding tissues and reduces intraoperative bleeding. Emboli may be made of different materials like: fibrin sponge (Gelfoam), acrylic resin (Bucrylate) or steel (Gianturco coil). The association of both the steel coil and one of the other two types of emboli may be the method of choice. The metallic device is indicated for main vessel occlusion, while the others are more suitable for more peripheral branches. Selective or superselective catheterization in required for emboli introduction and care must be taken when occluding the renal artery to avoid reflux and to permit surgical clamping.