[Acute renal vein thrombosis in infancy (author's transl)]

Two cases of acute renal vein thrombosis are presented. Instead of angiography, sonography was used to perform the diagnosis. After short discription of the etiology, clinic and roentgensymptomatology, the sonographic semiology is emphasized. In the discussion the sonographic differentialdiagnosis is reviewed and the possible therapeutic proceedings are mentioned. The value of sonography as non-invasive method, especially in newborn is therefore established.