To provide a systematic approach and scheme to narrow the differential diagnosis of primary retroperitoneal masses,
based upon the predominant cross-sectional imaging appearance.
INTRODUCTION Primary retroperitoneal neoplasms are a diverse group of benign and malignant tumors that arise within the retroperitoneum but outside the major organs . Of the primary retroperitoneal neoplasms,
70%–80% are malignant in nature,
and these account for 0.1%–0.2% of all malignancies in the body. One-third of malignant retroperitoneal neoplasms are sarcomas; 15% of all sarcomas originate within the retroperitoneum. Although computed tomography and magnetic resonance imaging can...
Findings and procedure details
Approach to retroperitoneal masses 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 . 1. Tumor location (Determining tumor location into the retroperitoneal spaces) Displacement of normal retroperitoneal structures,
such as retroperitoneal organs...
The differential diagnosis of primary retroperitoneal masses may be based on the predominant cross-sectional imaging appearance as either cystic or solid and neoplastic and non-neoplastic. Characteristic imaging findings,
such as the composition (Fat,
calcification and necrosis),
and relationship to adjacent structures,
may be combined with clinical information and assisted by diagnostic scheme to help narrow the differential diagnosis.
Dr.Ahmed Hassan Ali Mohamed Demonstrator of radiology,
National cancer institute,
Egypt. E-mail: Ahmed.firstname.lastname@example.org Doc.email@example.com Asst Prof.Hisham S.Wahba Mikhael Assistant professor of radiology,National cancer institute,
Cairo university, Egypt. Fellow of McGill University,
Canada Prof.Sameh Abdel Aziz Hanna Professor of radiology,
Faculty of medicine,
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