Akram Mohamed Shaaban MBBCh, Presenter: Contributor, Amirsys, Inc

Maryam Rezvani MD, Abstract Co-Author: Nothing to Disclose

Marc Tubay MD, Abstract Co-Author: Royalties, Amirsys Inc

Khaled M. Elsayes MD, Abstract Co-Author: Nothing to Disclose

Christine O. Menias MD, Abstract Co-Author: Nothing to Disclose

1. The learner should be able to differentiate between primary and secondary retroperitoneal masses 2. The learner should be able to list fat-containing lesions occurring in the retroperitoneal, both primary and secondary. 3. The learner should be able to compile a short differential diagnosis based on the location, imaging features and clinical presentation.

I. Imaging features of fat on different imaging modalities II. Differentiation between primary and secondary retroperitoneal masses III. Causes and differential diagnosis of fat containing retroperitoneal lesion A. Renal 1- Angiomyolipoma 2- Lipoma 3- Liposarcoma 4- Replacement lipomatosis B. Adrenal 1- Myelolipoma 2- Adrenal carcinoma 3- Pheochromocytoma 4- Neurogenic tumors Primary retroperitoneal lesions 1- Lipoma 2- Liposarcoma 3- Lipomatosis 4- Myelolipoma 5- Primary and metastatic malignant germ cell tumors 6- Dermoid 7- Neurogenic tumors 8- Fat necrosis

http://abstract.rsna.org/uploads/2014/14003130/14003130_vww9.pdf

Shaaban, A, Rezvani, M, Tubay, M, Elsayes, K, Menias, C, Fat-containing Retroperitoneal Lesions: Imaging Characteristics, Localization and Differential Diagnosis.  Radiological Society of North America 2014 Scientific Assembly and Annual Meeting, - ,Chicago IL. http://archive.rsna.org/2014/14003130.html