[Diagnosis of perforation of the kidney pelvis using sonography].

In a case report the diagnostics of a perforation of the renal pelvis using ultrasound is presented. Spontaneous urinary extravasations of the renal pelvis may appear in a previously diseased urinary tract also without the diuretic effect of contrast media. The ultrasound examination show the perirenal fluid collections and the diagnosis of spontaneous perforation of the renal pelvis is stated together with the clinical course.