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(mee-dee-a-STYE-num)
![](https://webarchive.library.unt.edu/eot2008/20081022042854im_/http://www.nci.nih.gov/images/spacer.gif)
| The area between the lungs. The organs in this area include the heart and its large blood vessels, the trachea, the esophagus, the bronchi, and lymph nodes. |
Previous Definitions: | median survival time, median umbilical ligament, mediastinal pleura, mediastinoscope, mediastinoscopy | Next Definitions: | medical castration, medical device, medical nutrition therapy, medical oncologist, medication |
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