The differential diagnosis of hypersensitivity pneumonitis is, primarily, a group of diseases known as idiopathic interstitial pneumonias. This group of diseases includes idiopathic pulmonary fibrosis (IPF) (which manifests histologically as usual interstitial pneumonia (UIP)), idiopathic non-specific interstitial pneumonia (NSIP) and cryptogenic organizing pneumonia, among others. There are several important clinical syndromes that occur as a result of inhalation of organic agents but are not true forms of Hypersensitivity Pneumonitis.
Byssinosis differential diagnosis
Rhinitis differential diagnosis
Tularemia differential diagnosis
Roseola differential diagnosis
Babesiosis differential diagnosis
Impetigo differential diagnosis
Psittacosis differential diagnosis
Blepharitis differential diagnosis