Respiratory sounds

Differential diagnosis of causes of reduced breath sounds
In alphabetical order.

Decreased/Absent

 * Asthma
 * Atelectasis
 * Bronchial occlusion
 * COPD
 * Diaphragmatic disorders
 * Emphysema
 * Infiltration
 * Pleural Effusion
 * Pleural Fibrosis
 * Pleuritis
 * Pneumothorax
 * Pulmonary stasis
 * Severe Obesity