Acute glomerulonephritis associated with pneumonia: a review of three cases.

We evaluated the clinical presentation and prognosis of three children with acute glomerulonephritis (AGN) associated with pneumonia. The patient database of Niño Jesús Children's Hospital was analyzed retrospectively (1996-2007) for patients diagnosed at discharge with both pneumonia and AGN. Those with recent pharyngeal or cutaneous infection were excluded. Three patients (1.67, 4.25, and 5 years old, respectively) were selected. All of them had lobar pneumonia, developing both macrohematuria and proteinuria within 24 h after admission. Decreased glomerular filtration rate was found in one patient. Two children developed arterial hypertension and one a slight pleural effusion. Two children had low C3 levels, and one had both low C3 and C4 levels. A Streptococcus pneumoniae serotype 17F was isolated from the blood culture of one patient. On follow-up, all patients had normal blood pressure and renal function with microhematuria persisting long term. Our patients with pneumonia-associated AGN had a good prognosis for both pulmonary and renal involvement.