Tuberculosis infection in children with proteinuria/nephrotic syndrome.

Children with nephrotic syndrome (NS) are at greater risk of infections than the general population, due to immunodeficiency in the course of the disease and the treatment. In this study we present 4 children (2 girls, 2 boys), mean age 7.6 ±5.1 years, with NS/proteinuria and latent tuberculosis in 3 children and lymph node tuberculosis in 1 child. The reasons for testing these children for tuberculosis (TB) were the evaluation of the epidemiological status before treatment with corticosteroids (GCS), leukopenia and the relapse of NS, and non-nephrotic proteinuria. The diagnosis of TB infection was based on positive IGRA (Interferon-Gamma Release Assay). Chest X-ray was normal in all the children. Chest CT scan revealed an enlargement of lymph nodes in 1 child. The children were treated with isoniazid (3 children) and isoniazid, rifampicin and pyrazinamide (1 child). Three children with idiopathic nephrotic syndrome were treated with prednisone. The child with non-nephrotic proteinuria was treated with enalapril. Proteinuria disappeared in all children during anti-TB treatment.