Pneumomediastinum

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Overview

Pneumomediastinum (or mediastinal emphysema, from Greek pneuma - "air") is a condition in which air is present in the mediastinum. First described in 1819. Pneumomediastinum is uncommon, it occurs when air leaks from any part of the lung or airways into the mediastinum and is often recognized by a "crunching" sound (Hamman's crunch).

Chest X Ray

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References

Acknowledgements

The content on this page was first contributed by: C. Michael Gibson M.S., M.D.

v • d • e Pathology of respiratory system (J, 460–519), respiratory diseases
Acute upper respiratory infections	Upper respiratory tract infection · Common cold · Rhinitis · Sinusitis · Pharyngitis (Strep throat) · Tonsillitis · Laryngitis · Tracheitis · Croup · Epiglottitis
Influenza and Pneumonia	Influenza · Pneumonia (Viral, Bacterial, Bronchopneumonia) · Severe acute respiratory syndrome
Other acute lower respiratory infections	Bronchitis (Acute, Chronic) · Bronchiolitis
Other diseases of upper respiratory tract	Vasomotor rhinitis · Hay fever · Atrophic rhinitis · Nasal polyp · Deviated septum · Adenoid hypertrophy · Peritonsillar abscess · Vocal fold nodule · Laryngospasm
Chronic lower respiratory diseases	Emphysema · COPD · Asthma · Status asthmaticus · Bronchiectasis
Lung diseases due to external agents	Pneumoconiosis (Coalworker's pneumoconiosis, Asbestosis, Silicosis, Bauxite fibrosis, Berylliosis, Siderosis) · Byssinosis · Hypersensitivity pneumonitis (Farmer's lung, Bird fancier's lung)
Other, principally affecting the interstitium	Acute respiratory distress syndrome · Pulmonary edema · Hamman-Rich syndrome · Interstitial lung disease
Suppurative and necrotic conditions of lower respiratory tract	Lung abscess · Pleural effusion · Empyema
Other	Pneumothorax · Hemothorax · Hemopneumothorax · Mendelson's syndrome · Respiratory failure · Atelectasis · Mediastinal emphysema · Mediastinitis
see also congenital (Q30–Q34, 748)

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Acknowledgement and Attribution Regarding Sources of Content

Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .