Hemolytic uremic syndrome.
This 4-year-old boy presented with bloody stools, hypertension, oliguria, thrombocytopenia, and a creatinine level of 1.6. A. The night of admission, the patient became tachypneic. Chest radiography shows pulmonary edema, a left pleural effusion, and mild cardiomegaly, due to renal failure and hypoalbuminemia. B. Sonographic evaluation 10 days after clinical onset shows the right kidney to have diffusely prominent echogenicity.