postmediastinal

post·me·di·as·ti·nal

(pōst'mē-dē-as'ti-năl, -mē'dē-ă-stī'năl),
1. Posterior to the mediastinum.
2. Relating to the posterior mediastinum.

postmediastinal

(pōst″mē-dē-ăs′tĭ-năl) [″ + mediastinum, in the middle]
Behind the mediastinum.
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