Proteinuria persistente en pacientes pediátricos, caracterización histopatológica y su influencia en la progresión de la enfermedad renal crónica Persistent proteinuria in pediatric patients, histopathological characterization and its influence on chronic kidney disease progression / Proteinúria persistente em pacientes pediátricos, caracterização histopatológica e sua influência na progressão da doença renal crónica Resultados: se incluyeron 71 pacientes. La edad promedio del diagnóstico de proteinuria persistente fue 10.07 años. El 69.1% y 20.6% de los pacientes presentaron hematuria e hipertensión arterial respectivamente. La glomerulonefritis por IgA fue el hallazgo histológico más frecuente (21.13%), seguido de la nefropatía lúpica (18.31%). Del total de pacientes, 69.0% recibieron inhibidores de la enzima convertidora de angiotensina y el 15.9% presentaron deterioro de la función renal al cuarto año de seguimiento. Conclusiones: la prevalencia de glomerulopatías en niños con proteinuria persistente fue alta. Se sugiere la realización de la biopsia renal con el fin de detectar tempranamente glomerulopatías primarias o secundarias asociadas para así instaurar un tratamiento oportuno que controle o retarde el deterioro de la función renal. Palabras clave: proteinuria; niño; biopsia; insuficiencia renal crónica. ABSTRACT Objective:To describe the histopathological findings and their progression of chronic kidney disease in pediatric patients who underwent kidney biopsy due to persistent proteinuria during 2005-2015 at a high-complexity hospital in Medellin, Colombia. Methods: A retrospective, cohort study was carried out; the medical records of children under 18 with diagnosis of persistent proteinuria were reviewed. Sociodemographic, clinical, and histopathological variables were analyzed. Results: A total of 71 patients were included. The mean age at the diagnosis of persistent proteinuria was 10.07 years old. 69.1% and 20.6% of the patients had hematuria and hypertension, respectively. Overall, the predominant pathological diagnosis in the current study was IgA nephropathy (21.13%) followed by lupus nephropathy (18.31%). 69.0% of the patients received angiotensin-converting enzyme inhibitors. At the last follow-up, 15.9% presented impaired renal function.
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