<unk>  is a rare disease. Parasitic causes are most common in geographic areas where each parasite is endemic. Acute<unk>  can occur at any age, even in previously healthy children, though most patients are between 20 and 40 years of age. Men are affected approximately twice as frequently as women. Acute<unk>  has been associated with smoking. Chronic<unk>  occurs more frequently in women than men and does not appear to be related to smoking. An association with radiation for breast cancer has been described. History Chronic<unk>  was first described by Carrington in 1969, and it is also known as Carrington syndrome. Prior to that,<unk>  was a well-described pathologic entity usually associated with medication or parasite exposures. Acute<unk>  was first described in 1989.
Eosinophilic pneumonia
Atypical pneumonia
Acute eosinophilic pneumonia
Lipid pneumonia
Cryptogenic organizing pneumonia
Lobar pneumonia
Parasitic pneumonia
Fungal pneumonia