thoracic duct Trunk of lymphatic tree organ part Bronchomediastinal lymphatic trunk 9585 Truncus lymphaticus bronchomediastinalis AS bronchomediastinal lymph trunk Truncus bronchomediastinalis (Ductus lymphaticus) Trunk of lymphatic tree organ part, each instance of which is either of the two lymphatic trunks (right and left) that drain some pulmonary, bronchopulmonary, tracheobronchial, tracheal, and parasternal lymphatic chains (lymph nodes and lymphatic vessels): that on the right side drains into some right lymphatic duct or subclavian vein, and that on the left into some thoracic duct or some subclavian vein. Bronchomediastinal lymphatic trunk fma:fma9585 FMA:9585