plexus mammarius

in·ter·nal tho·rac·ic lym·phat·ic plex·us

a lymphatic plexus, including the parasternal lymph nodes, with their vessels, situated along the course of the internal thoracic veins.

plexus mammarius

An obsolete term for:
(1) A nerve plexus in the breast parenchyma; 
(2) A network of autonomic nerves surrounding the internal thoracic artery.
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