Hypersensitivity pneumonitis Flashcards
What is hypersensitivity pneumonitis?
Hypersensitivity induced lung damage due to a variety of inhaled organic particles
What type of hypersensitivity reaction is involved in hypersensitivity pneumonitis?
Type III and type IV
What are examples of types of hypersensitivity pneumonitis?
Bird fanciers lung
Farmers lung
Malt workers lung
Mushroom workers lung
What is the acute presentation of hypersensitivity pneumonitis?
Dyspnoea
Dry cough
Fever
What is the chronic presentation of hypersensitivity pneumonitis?
Lethargy
Dyspnoea
Productive cough
Anorexia and weight loss
What investigations are involved in the diagnosis of hypersensitivity pneumonitis?
CXR
Bronchoalveolar lavage
Serological assays for IgG antibodies
What is seen on CXR in hypersensitivity pneumonitis?
Upper and mid zone fibrosis
What is the management of hypersensitivity pneumonitis?
Avoid precipitating factors
Oral glucocorticoids
