May Cause

Chronic disseminated air-space opacity

Widespread small irregular lung opacities

May Be Caused by

 Common

Achalasia

Alcoholism

Ascariasis

Aspiration

Asthma

Brain damage

Bronchial stenosis

Bronchiectasis

Bronchogenic carcinoma

Broncholith

Chronic bronchopleural fistula

Cystic fibrosis

Esophageal carcinoma

Esophageal stricture

Foreign body in bronchus

Hiatal hernia

Idiopathic

Inadequate drug therapy

Lung carcinoid

Lung neoplasm

Mucus plug

Myasthenia gravis

Opportunistic infection

Paragonimiasis

Paralysis

Parasitic disease

Schistosomiasis

Scleroderma

Stroke

Strongyloidiasis

Tropical pulmonary eosinophilia

Zenker diverticulum

 Uncommon

Ankylosing spondylitis

Choanal atresia

Chronic granulomatous disease of childhood

Chronic sinusitis

Cleft palate

Connective tissue disease

Eosinophilic pneumonia

Esophageal bronchus

Fungal disease

Hypersensitivity pneumonitis

Immotile cilia syndrome

Intralobar pulmonary sequestration

Kartagener syndrome

Laryngeal disease

Löffler syndrome

PIE

Primary anemia

Rheumatoid spondylitis

Riley-Day syndrome

Sickle cell disease

Systemic lupus erythematosus

Tracheal lesion

Tracheoesophageal fistula

Tracheostomy

Tuberculosis

Vascular ring