pneumomediastinum

Medical Dictionary

pneumomediastinum pneu·mo·me·di·as·ti·num (nōō'mō-mē'dē-ə-stī'nəm, nyōō'-)
n.
The escape of air into the mediastinal tissues, usually from interstitial emphysema or from a ruptured pulmonary bleb.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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