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me·di·as·ti·num

npl  -na   1  :  the space in the chest between the pleural sacs of the lungs that contains all the viscera of the chest except the lungs and pleurae : also  :  this space with its contents  2  :  MEDIASTINUM TESTIS .
 
 

 
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Mount San Rafael Hospital (Trinidad, Colorado - Las Animas County)