Relating to the mediastinum.
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me·di·as·ti·nal .mēd-ē-ə-'stī-nəl adj of, relating to, or affecting the mediastinum <\mediastinal fibrosis>
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me·di·as·ti·nal (me″de-ə-stiґnəl) of or pertaining to the mediastinum.Medical dictionary. 2011.