https://cancer.ca/en/cancer-information/resources/glossary/r/retroperitoneum
retroperitoneum | Canadian Cancer Society
The area in the back of the abdomen that is outside or behind the peritoneum (the membrane that lines the walls of the abdomen and pelvis, and covers and...
retroperitoneumcanadiancancersociety
https://www.merlot.org/merlot/viewMaterial.htm?id=681358
M1 Gastrointestinal & Liver- Kidney and Retroperitoneum Notes
liver kidneym1gastrointestinalretroperitoneumnotes