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Hypersensitivity pneumonitis


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Hypersensitivity pneumonitis

Alternative Names:

Extrinsic allergic alveolitis; Farmer's lung; Mushroom picker's disease; Humidifier or air-conditioner lung; Bird breeder's lung
Symptoms:

Acute hypersensitivity pneumonitis may have the following symptoms:

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Chronic hypersensitivity pneumonitis may have the following symptoms:

  • Breathlessness, especially with exertion
  • Cough, often dry
  • Loss of appetite
  • Unintentional weight loss

Signs and tests:

Crackles (rales) may be heard when a stethoscope is used to examine the chest.

Tests may include the following:
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