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Hypersensitivity pneumonitis

Última revisão: 2 Oct 2025
Última atualização: 09 Sep 2025

Resumo

Definição

História e exame físico

Principais fatores diagnósticos

  • exposure to avian protein antigen, especially excrement
  • mold in work environment
  • occupational exposure to chemicals
  • dyspnea
  • cough
Detalhes completos

Outros fatores diagnósticos

  • fever/chills
  • malaise
  • weight loss/anorexia
  • bibasilar rales
  • diffuse rales
  • clubbing
Detalhes completos

Fatores de risco

  • smoking
  • viral infection
  • exposure to avian protein antigen
  • exposure to mold antigen
  • exposure to bacterial antigen
  • exposure to diisocyanate (e.g., epoxy resin)
  • exposure to acid anhydride antigen (e.g., paint refinisher)
  • exposure to metalworking fluid
  • use of certain drugs
  • use of e-cigarettes
  • ayurvedic medicine
Detalhes completos

Investigações diagnósticas

Primeiras investigações a serem solicitadas

  • chest x-ray
  • high-resolution CT chest
  • serum antigen-specific IgG or IgA
  • pulmonary function tests
  • diffusing lung capacity of carbon monoxide
Detalhes completos

Investigações a serem consideradas

  • bronchoalveolar lavage
  • lung biopsy
Detalhes completos

Algoritmo de tratamento

AGUDA

all patients

Colaboradores

Autores

Leslie Grammer, MD

Professor

Northwestern University Feinberg School of Medicine

Director

Ernest S. Bazley Asthma and Allergy Center

Clinic Practice Director

Allergy-Immunology

Northwestern Medical Faculty Foundation

Chicago

IL

Disclosures

LG declares that she has no competing interests.

Peer reviewers

Maximiliano Tamae-Kakazu, MD, FCCP

Associate Professor of Medicine

Program Director, Pulmonary and Critical Care Medicine Fellowship

Research Director, Pulmonary and Critical Care Medicine

Corewell Health West - Michigan State University College of Human Medicine

East Lansing

MI

Disclosures

MTK received fees from InflaRx as a consultant to participate in a COVID-19 pneumonia Advisory Board. MTK received fees from Pfizer as a consultant to participate in a healthcare disparities in primary immunodeficiencies advisory board. MTK received fees from Regeneron as consultant on the pathophysiology of asthma and need of education in fellowship programs advisory board in January 2022. All the honoraria have been donated to the Corewell Health Foundation.

Toby M. Maher, MB, MSc, PhD, MRCP

Consultant Respiratory Physician

Interstitial Lung Disease Unit

Royal Brompton Hospital

London

UK

Disclosures

TMM has received consultancy fees from GSK, Actelion, and Philips Respironics. He has received lecture fees from Astra Zeneca and holds an unrestricted industry-academic grant from GSK.

Peer reviewer acknowledgements

BMJ Best Practice topics are updated on a rolling basis in line with developments in evidence and guidance. The peer reviewers listed here have reviewed the content at least once during the history of the topic.

Disclosures

Peer reviewer affiliations and disclosures pertain to the time of the review.

References

Our in-house evidence and editorial teams collaborate with international expert contributors and peer reviewers to ensure that we provide access to the most clinically relevant information possible.

Key articles

Raghu G, Remy-Jardin M, Ryerson CJ, et al. Diagnosis of hypersensitivity pneumonitis in adults. An Official ATS/JRS/ALAT clinical practice guideline. Am J Respir Crit Care Med. 2020 Aug 1;202(3):e36-69.Full text  Abstract

Quirce S, Vandenplas O, Campo P, et al. Occupational hypersensitivity pneumonitis: an EAACI position paper. Allergy. 2016 Jun;71(6):765-79.Full text  Abstract

Fernández Pérez ER, Travis WD, Lynch DA, et al. Diagnosis and evaluation of hypersensitivity pneumonitis: CHEST guideline and expert panel report. Chest. 2021 Aug;160(2):e97-156.Full text  Abstract

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