[Renal arterial aneurysms--diffuse renal arterial ectasia. (Review and case histories) (author's transl)].

Two cases of renal arterial aneurysm or diffuse renal arterial dilatation are presented. Frequency, pathogenesis, clinical appearance, and prognosis of this disorder are discussed. Major complications include rupture or thrombosis of the renal artery, and hypertension due to renal ischemia; the latter is best diagnosed by renin determination in renal venous blood collected by selective catheterization.