[Prolonged contrast of kidney tumors using an oily x-ray contrast medium]

In 194 patients with tumourous kidney disease an angiographic investigation with the oily x-ray contrast medium Iodolipol was carried out. A selective tropism of oily-x-ray contrast media was found that was only retained in zones of malignant disease. The application of the preparation caused no complications. The oily x-ray contrast medium persisted in the tumours over several weeks or months. After embolization of the renal artery a moderate size reduction of malignant tumours in the first 10-14 d was seen. The ability of Iodolipol for a lasting retainment in malignant tumour tissue allows a follow-up of the involution of the pathologic focus after arterial embolization of the tumour vessels.