Health Dictionary
Reliable, easy-to-read patient information on common medical conditions — written in plain language, free of jargon, and grounded in current evidence. Browse the most frequent diagnoses, understand what they mean for everyday life, and learn which steps and questions help you have a focused conversation with your doctor.
Hamman's syndrome
Introduction
Hamman’s syndrome is a syndrome of spontaneous subcutaneous emphysema and pneumomediastinum associated with pain. Named for Johns Hopkins clinician Louis Hamman, M.D.