Alveoli are the functional units of the lungs.<unk> s are classified as processes that affect these units that ultimately lead to issues with ventilation. There are a number of different causes of insult to the alveoli including build up of fluid, hemorrhage, infection, malignancy and build up of protein and mineral deposits. Conditions classified under<unk>  include pulmonary edema (cardiogenic or non-cardiogenic), pneumonia (bacterial or viral), bronchoalveolar carcinoma, pulmonary hemorrhage, alveolar proteinosis and amyloidosis, and alveolar microlithiasis.<unk>  may be divided into acute or chronic. Causes of acute<unk>  include pulmonary edema (cardiogenic or neurogenic), pneumonia (bacterial or viral), systemic lupus erythematosus, bleeding in the lungs (e.g., Goodpasture syndrome), idiopathic pulmonary hemosiderosis, and granulomatosis with polyangiitis. Chronic<unk>  can be caused by pulmonary alveolar proteinosis, alveolar cell carcinoma, mineral oil pneumonia, sarcoidosis (alveolar form), lymphoma, tuberculosis, metastases, or desquamative interstitial pneumonia.
Alveolar lung disease
Viral pneumonia
Pulmonary alveolar proteinosis
Chemical pneumonitis
Radiation-induced lung injury
Rheumatoid lung disease
Lobar pneumonia
Alcoholic lung disease