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a dilated sac at the lower end of the thoracic duct into which the intestinal trunk and two lumbar lymphatic trunks open; it occurs inconsistently and when present is located posterior to the aorta on the anterior aspect of the bodies of the first and second lumbar vertebrae.
a dilation at the beginning of the thoracic duct, situated ventrally to the body of the second lumbar vertebra, on the right side of and dorsally to the aorta. It receives the two lumbar lymphatic trunks and the intestinal lymphatic trunk. Also called Pecquet's cistern.