HP hypersensitivity pneumonitis

• related: ILD Interstitial Lung Disease or Diffuse Parenchymal Lung Disease
• tags: #literature

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• HP hypersensitivity pneumonitis is divided into fibrotic and nonfibrotic types

Image findings

• image findings in hypersensitivity pneumonitis include GGO, centrilobular micronodules, and mosaicism
• air trapping differentiates between fibrotic NSIP and fibrotic HP
  • NSIP has no air trapping. Use HRCT
• fibrotic HP usually will also have LAD

Diagnosis

• diagnosis of HP is in imaging and BAL with high lymphocyte count

Disease associations

• MAC infection can induce hypersensitivity pneumonitis in patients with exposure to hot tube water
• mulch pneumonitis is hypersensitivity in CGD patients
• pool, hot tub, mold, cheese, beer

Treatment

• steroid taper for HP hypersensitivity pneumonitis
• Pred first line and cellcept next to taper off pred. ritux is salvage therapy

Literature Note

• Fundamentals of High Resolution Lung CT
• fibrotic HP management

Links to this note

• Pulmonology

  • HP hypersensitivity pneumonitis

• ILD Interstitial Lung Disease or Diffuse Parenchymal Lung Disease

  • fibrotic or nonfibrotic (HP hypersensitivity pneumonitis)

  • HP hypersensitivity pneumonitis

• Fundamentals of High Resolution Lung CT

  • HP hypersensitivity pneumonitis

• lymphocytic BAL points to inflammatory etiologies

  • lymphocyte > 50% suggests HP hypersensitivity pneumonitis or NSIP

• image findings in hypersensitivity pneumonitis include GGO, centrilobular micronodules, and mosaicism

  • related: HP hypersensitivity pneumonitis

• diagnosis of HP is in imaging and BAL with high lymphocyte count

  • related: HP hypersensitivity pneumonitis

• HP hypersensitivity pneumonitis is divided into fibrotic and nonfibrotic types

  • related: HP hypersensitivity pneumonitis

• steroid taper for HP hypersensitivity pneumonitis

  • related: HP hypersensitivity pneumonitis