Acute Upper Airway Disorders
   Infections
       Croup
       Epiglottitis
   Obstruction/Foreign body

Disorders of Pleura, Mediastinum, and Chest Wall
   Costochondritis
   Mediastinitis
   Pleural effusion
   Pleuritis
   Pneumomediastinum
   Pneumothorax
       Simple
       Tension
       Open
Empyema

Acute Respiratory Distress Syndrome
Obstructive/Restrictive Lung Disease
    Asthma/Reactive airway disease
    Bronchitis and bronchiolitis
    Bronchopulmonary dysplasia
    Chronic obstructive pulmonary disease
    Cystic fibrosis
    Environmental/Industrial exposure
    Foreign body
Physical and Chemical Irritants/Insults
    Pneumoconiosis
    Toxic effects of gases, fumes, vapors

Pulmonary Embolism/Infarct
    Septic emboli
    Venous thromboembolism
    Fat emboli
Pulmonary Infections
    Lung abscess
    Pneumonia
        Aspiration
        Community-acquired
          Health care-associated
    Pulmonary tuberculosis
    Respiratory syncytial virus (RSV)
    Pertussis
Tumors
    Breast
    Pulmonary
Pulmonary Hypertension