ACUTE pyelonephritis is a common disease the clinical signs and symptoms of which have been well known for many years. The roentgenographic findings, however, have been emphasized only relatively recently.1-5 In two large series of acute pyelonephritis, about one fourth of the patients had abnormalities on the excretory urogram.2,3 We believe that the high incidence of urologic abnormalities justifies a review of the roentgenographic findings in light of the limited information now available on the subject.
Ileus of the Ureter.—
Gram-negative bacilli have the ability to impede or stop ureteral peristalsis.6 Since most urinary tract infections are due to Escherichia coli,7 it is not surprising that ileus of the ureter may be seen with acute pyelonephritis. Although the entire collecting system may be dilated, mimicking obstruction,1 it is our experience that involvement is usually of the proximal portion of the infected ureter. This