Abstract
A case of migrating thrombophlebitis due to cancer of the stomach in a man aged 65 is described. There were clinical signs of multiple thrombi. Of particular interest is the renal involvement with thrombi in intrarenal arteries leading to several infarctions of the parenchyma and to considerable enlargement of the kidneys. An interesting pattern suggesting extrarenal obstruction of the urinary flow was seen In the radio-renogram. As such an obstruction of the urinary flow could be excluded, other possible mechanisms explaining the radiorenogram findings are discussed.