Source:http://linkedlifedata.com/resource/umls/id/C0035359
MSH: 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.,NCI: Having to do with the area outside or behind the peritoneum (the tissue that lines the abdominal wall and covers most of the organs in the abdomen).,NCI: The back of the abdomen where the kidneys lie and the great blood vessels run. (NCI),NCI: The back of the abdomen where the kidneys lie and the great blood vessels run.,NCI: Occurring in, or located in the retroperitoneum.