[Hemolytic-uremic syndrome in the adult (author's transl)].

This article presents six cases of hemolytic-uremic syndrome, defined as the combination of acute renal insufficiency, microangiopathic hemolytic anemia, and thrombocytopenia, in six adult patients, two men and four women, between 20 and 52 years old. Three of the cases were considered idiopathic, two secondary to the use of oral contraceptives, and one appeared after an abortion. All of the patients presented severe hypertension, frequently accompanied by increased renin levels; in no cases was there any important coagulation disorder. In all of the biopsies there were lesions denoting intravascular thrombosis in the arterioles and medium-sized arteries of the kidney, as well as thickening of the glomerular basal membrane. Immunofluorescence was positive for fibrinogen and C3 in the majority of biopsies examined. Two patients suffered acute pancreatitis, hypertension having perhaps been an important factor in this complication. One of the two patients died as a result of acute hemorrhagic pancreatitis and was the only death in the series. Of the five remaining subjects, three required periodic hemodyalisis and the other two presented a considerable degree of chronic renal failure, which confirms that the prognosis for the hemolytic-uremic syndrome is much worse for the adult than for the child.