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Hypersensitivity, also known as a hypersensitivity reaction or allergic reaction, is a condition where the body's immune system reacts abnormally to a foreign substance. Such substances, that cause hypersensitivity are referred to as an allergen, could be something typically harmless to most people, like pollen or certain foods.
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Contact Hypersensitivity as a Murine Model of Allergic Contact Dermatitis
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[Hypersensitivity pneumonitis in children].

T Soumagne1, M L Dalphin2, J C Dalphin3

  • 1Service de pneumologie, hôpital Jean-Minjoz, CHU de Besançon, 25030 Besançon cedex, France.

Revue Des Maladies Respiratoires
|April 24, 2019
PubMed
Summary
This summary is machine-generated.

Hypersensitivity pneumonitis (HP) is a rare lung disease in children caused by immune responses to inhaled antigens. Prompt diagnosis and complete antigen avoidance lead to better prognoses in pediatric patients.

Keywords:
ChildrenEnfantHypersensitivity pneumonitisInterstitial lung diseasePneumopathie d’hypersensibilitéPneumopathie interstitielle

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Area of Science:

  • Pulmonology
  • Immunology
  • Pediatrics

Background:

  • Hypersensitivity pneumonitis (HP) is an interstitial lung disease triggered by immune responses to inhaled antigens.
  • While rare in children, HP is likely underdiagnosed, with an estimated prevalence of 4 per million.
  • Pediatric HP shares similarities with adult forms but has unique characteristics, with avian exposure being the most common cause.

Purpose of the Study:

  • To summarize the key aspects of hypersensitivity pneumonitis in children.
  • To highlight diagnostic criteria and treatment strategies for pediatric HP.
  • To discuss the prognosis of HP in the pediatric population.

Main Methods:

  • Review of existing literature on pediatric hypersensitivity pneumonitis.
  • Analysis of diagnostic criteria including symptoms, antigen exposure, lymphocytic alveolitis, gas exchange abnormalities, and imaging.
  • Evaluation of treatment modalities and prognostic factors.

Main Results:

  • Diagnosis of HP relies on a combination of clinical symptoms, antigen exposure history, lymphocytic alveolitis, impaired gas exchange, and characteristic radiologic findings.
  • Avian antigen exposure accounts for nearly two-thirds of pediatric HP cases.
  • Complete antigen avoidance is the cornerstone of treatment, with corticosteroids used for severe cases.

Conclusions:

  • Pediatric HP, though rare, requires prompt recognition and management.
  • Antigen avoidance is crucial for treatment, and recovery is generally favorable in children compared to adults.
  • Complete withdrawal from the offending antigen can lead to full clinical and functional recovery in most pediatric cases.