Structures that pass from thorax to abdomen behind the diaphragm are all except:
The aoa, thoracic duct, azygous vein passes through the aoic opening, which lies behind the diaphragm. The greater splanchnic nerve along with the lesser splanchnic nerve passes through the crus of diaphragm but not behind the diaphragm.Ref: Human Anatomy, B D Chaurasia, 4th Edition, Volume 1, Chapter 12, Page 185; Clinical Anatomy by Systems, Richard S. Snell, 2007 Edition, Chapter 3, Page 87.
Aoa
Azygos vein
Thoracic duct
Greater splanchnic nerve