[Acute lobar nephronia (focal bacterial pyelonephritis). Apropos of 3 cases in children]. / Nefronía lobar aguda (pielonefritis bacteriana focal). A propósito de tres casos en edad pediátrica.

We present three cases of acute lobar nephronia or acute focal bacterial nephritis on paediatric patients. Both radiological and echographic pictures are described, emphasizing those aspects which, together with a clinical symptomatology, allow a differential diagnose with abscess and neoplasias renally settled. We think that, among those patients suffering from pyelonephritis, an early practice of renal echography followed by further controls, allow an early detection of lobar nephronia cases and assessing a response to the treatment.