All the structures lie behind thoracic duct at the root of the neck except
Correct Answer: Right phrenic nerve
Description: The thoracic duct begins as a continuation of the upper end of the cisterna chyli near the lower border of the twelfth thoracic veebra and enters the thorax through the aoic opening of the diaphragm.In the NeckThe thoracic duct forms an arch rising about 3-4 cm above the clavicle. The arch has the following relations:Anteriorly: (i) Left common carotid aery, (ii) left vagus, and (iii) left internal jugular vein.Posteriorly: (i) Veebral aery and vein, (ii) sympathetic trunk, (iii) thyrocervical trunk and its branches, (iv) left phrenic nerve, (v) medial border of the scalenus anterior, (vi) preveebral fascia covering all the structures mentioned, and (vii) the first pa of the left subclan aery.Ref: BD Chaurasia; Volume 1; 6th edition; Page no: 272
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