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Medical Definition of Parasternal lymph nodes
1. A number of small nodes that lie along the course of the internal thoracic vessels; lymph enters these nodes from the anterior intercostal spaces, pericardium, diaphragm, liver and medial mammary gland; the efferent vessels pass upward to join the bronchomediastinal trunk of the same side. Synonym: nodi lymphatici parasternales. (05 Mar 2000)