| Popis: |
Renal carcinomas are often highly vascular tumours. From angiographic as well as from direct pathologic examinations it is well known that some tumours show arteriovenous shunts (1,2). A rapid opacification of the renal vein is sometimes seen indicating shunt flow. However, as a rather large amount of contrast medium is needed to visualize the renal vein, the incidence of arteriovenous shunts might be much more common than is shown by angiography. Information on renal blood flow and arteriovenous shunts is of basic interest in conjunction with the development of future alternative therapeutic methods in inoperable cases of renal carcinoma. Thus, dose calculations for direct arterial infusion of chemotherapeutic agents or embolization with microseeds loaded with cytostatic or radioactive material might be dependent on the knowledge of tumour blood flow. |
