[Conservative surgery of renal cancer].

Organ-preserving technologies are coming up to take the place of organ-removing operations for cancer of the kidney. A tumor size is not a decisive parameter any more as the decision is made in each individual case. Ultrasound, as a screening test, has changed the situation in the diagnosis of early stages of the disease, but routine urological examinations retain their importance. Postoperative monitoring with US angiography is essential for detecting relapses.