Carazo Gallego, BegonaMoreno-Perez, DavidNunez Cuadros, EsmeraldaMesa Fernandez, AlbaMartin Cantero, MariaObando Pacheco, PabloUrda Cardona, Antonio2023-02-122023-02-122016-10-011201-9712http://hdl.handle.net/10668/18797Background: A paradoxical reaction (PR) during anti-tuberculosis treatment is a phenomenon that is poorly studied in immunocompetent children. It is defined as a clinical or radiological worsening of preexisting tuberculosis (TB) disease.Methods: A retrospective descriptive study of children younger than 14 years of age was performed; these children developed PR during the years 2009 to 2014, following a diagnosis of TB. Demographic characteristics, microbiological results, treatment and outcome data were collected.Results: Of 51 children diagnosed with TB, five (9.8%) developed a PR; four of these children had pulmonary TB and the remaining patient had miliary TB with central nervous system involvement. The PR occurred at a median of 42 days (range 23-53 days) after initiating therapy. Corticosteroids were started when PR was suspected, at a median dose of 1 mg/kg/day. Clinical and radiological improvement was noted in all cases, with a median clinical regression time of 10.5 days (range 3-15 days) and a median radiological regression time of 45 days (range 26-105 days). No sequelae were described in any patient.Conclusions: PR in immunocompetent children during anti-tuberculosis treatment is not such an unusual reaction. Treatment with corticosteroids may be useful for the resolution of PR. (C) 2016 The Authors. Published by Elsevier Ltd on behalf of International Society for Infectious Diseases. This is an open access article under the CC BY-NC-ND license.enAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/TuberculosisParadoxical reactionImmunocompetentCorticosteroidsChildrenReconstitution inflammatory syndromeClinical spectrumCase definitionsRisk-factorsTherapyDeteriorationresearch articleopen access10.1016/j.ijid.2016.08.0091878-3511http://www.ijidonline.com/article/S1201971216311365/pdf388326700004