Canadian Medical Guide > Anatomy > Body Regions > Abdomen > Abdominal Cavity > Retroperitoneal Space Terms and Definitions

Retroperitoneal Space

Medical Definition:	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.
Guide Notes:	NIM: usually locational so few qualif apply; diagnostic retropneumoperitoneum or pneumoretroperitoneum: index under RETROPERITONEAL SPACE /radiogr (IM) + PNEUMORADIOGRAPHY (NIM): do not confuse with RETROPNEUMOPERITONEUM (Cat C)

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