| Hamman's syndrome | |
|---|---|
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| A CT scan showing air in the mediastinum with subcutaneous emphysema, which can result in Hamman's syndrome | |
| Specialty | Pulmonology  |
Hamman's syndrome, also known as Macklin's syndrome, is a syndrome of spontaneous subcutaneous emphysema[1] (air in the subcutaneous tissues of the skin) and pneumomediastinum (air in the mediastinum, the center of the chest cavity), sometimes associated with pain and, less commonly, dyspnea (difficulty breathing), dysphonia, and a low-grade fever.
Hamman's syndrome can cause Hamman's sign, an unusual combination of sounds that can be heard with a stethoscope.