Thoracic duct commonly terminates in:: (A) Internal jugular vein, (B) External jugular vein, (C) Brachio cephalic vein, (D) None of the above
Answer is A. In rare individuals there is no apparent thoracic duct on the left. Several terminal openings are frequent (10-40%, according to different observers). Patterns vary greatly in different studies, but the commonly repoed sites of termination are internal jugular vein (36-48%), jugulo-subclan junction (35%) and subclan vein (9% and 17%). Termination in the left brachiocephalic vein occurs in 8%.