Hypersensitivity pneumonitis associated with exposure to oxalic acid: based on a case
Neumonitis de hipersensibilidad asociada con exposición a ácido oxálico: partiendo de un caso
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INTRODUCTION: Hypersensitivity pneumonitis (HSP; extrinsic allergic alveolitis) is an immunological pulmonary disease caused by an exaggerated immune response to chemi- cal or organic particles inhalation affecting alveoli, terminal bronchioles and alveolar inters- titium. There are no reported cases associating oxalic acid-hypersensitivity pneumonitis. In addition, the infra-diagnosis contributes to the poor disease prognosis, which is the reason to present the case.
CASE DESCRIPTION: A 35-year-old patient with dyspnea and chronic dry cough after non-occupational exposure to oxalic acid, pulmonary function tests with restrictive pattern, chest high-resolution computed tomography (HRCT) suggestive of HSP and lung biopsy of a granuloma type cholesterol. Treatment is initiated without response, lung transplant reques- ted currently is on waiting list.
DISCUSSION: The patient met criteria for HSP suggested by Semin et al. (2012), once noxa retired there was no symptoms improvement, as well as the one use of corticoids, the diagnosis and treatment are considered late, elements which modified the response to it and finally altered the prognosis, the transplant improves the survival of patients in the short and medium term.
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