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Medical Definition of Retroperitoneal space
1. An area occupying the most posterior aspect of the abdominal cavity. It is bounded laterally by the borders of the quadratus lumborum muscles and extends from the diaphragm to the brim of the true pelvis, where it continues as the pelvic extraperitoneal space. (12 Dec 1998)
Lexicographical Neighbors of Retroperitoneal Space
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