الفهرس Only 14 pages are availabe for public view
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Abstract
The retroperitoneum is the compartmentalized space bounded anteriorly by the posterior parietal peritoneum and posteriorly by the transversalis fascia. It extends from the diaphragm superiorly to the pelvic brim inferiorly. The abdominal retroperitoneum is divided by fascial planes into the anterior and posterior pararenal spaces and the perirenal (or perinephric) space. The majority of retroperitoneal masses arises from retroperitoneal organs and is therefore not considered primary retroperitoneal mass. Diagnosis of a primary retroperitoneal mass may be made once the location is confirmed as within the retroperitoneal space and after an organ of origin is excluded. Primary retroperitoneal neoplasms are a diverse group of benign and malignant tumors that arise within the retroperitoneum but outside the major organs