The Thoracic Duct is the
largest lymphatic vessel in the body. It originates from the union of dilated
lumbar lymph trunks. Superior to the diaphragm the left half of the body drains
to the thoracic duct. Inferior to the diaphragm, all lymph drains to the thoracic
Lacerations of the thoracic duct result in lymph escaping into the thoracic cavity. Lymph (chyle) may enter the pleural cavity producing chylothorax.