Cisterna chyli

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The cisterna chyli is a thin-walled sac in the posterior abdominal wall of the abdominal cavity which represents the expanded lower end of the thoracic duct and is often replaced by a plexus of lymph channels. It lies against the bodies of the upper lumbar vertebrae, behind, or adjacent to, the right part of the aorta. It receives the right and left lumbar lymph trunks and the intestinal lymph trunk.