Explain the retroperitoneal spaces,
the boundaries that separate them and the anatomical structures they contain. Describe the characteristics of the main masses that can be developed in the retroperitoneum and that can be independent of solid organs.
This paper will focus on solid tumors that have a mesenchymal origin. Review images of patients from the Hospital Universitario y Politécnico la Fe de Valencia in relation to these pathologies to illustrate the description.
The differential diagnosis of retroperitoneal lesions is complex.
The knowledge of the retroperitoneal anatomy allows to delimit different spaces.
There are lesions that are unique or very characteristic of certain spaces.
it is necessary that the radiologist is familiar with them.
Findings and procedure details
SPACES OF THE RETROPERITONEUM The retroperitoneal spaces are: - The anterior pararenal space is anteriorly limited by the posterior aspect of the parietal peritoneum,
posteriorly by the anterior renal fascia and laterally by the lateral fascia.
It contains the pancreas and ascending and descending colon. - The posterior pararenal space is located between the posterior renal fascia and the fascia transversalis.
It contains two fat pads in contact with lumbar square muscle. - The perirenal...
For an accurate diagnosis of the retroperitoneal masses,
it is necessary to know its anatomical location and its radiological characteristics.
specific diagnosis may be difficult to determine because of overlapping of the different radiological findings between different entities.
Imaging of Uncommon Retroperitoneal Masses.
2011 Jul 1;31(4):949–76. 2.
Peritoneal and Retroperitoneal Anatomy and Its Relevance for Cross-Sectional Imaging.
2012 Mar 1;32(2):437–51. 3.
Radiology of the Retroperitoneum: Case-Based Review.
American Journal of Roentgenology.