|History: Middle-aged male; History withheld|
Multiple rounded, mildy enhancing homogenous soft tissue masses located in the retroperitoneum and in the mesentery. The aorta, IVC, and renal arteries are encased and displaced anteriorly. The superior mesenteric artery is encased. The vessels maintain patency. Enlarged, rounded axillary lymph nodes are also present.
|Diagnosis: Chronic Lymphocytic Leukemia (CLL); Pathology proven.|
Location is key to diagnosis when a retroperitoneal mass is encountered. If arising from a retroperitoneal organ, a claw(or beak)signmay be evident in the organ of origin. Other signs that help identify organ of origin are the "embedded organ" sign, or the"phantom" (invisible)organsign. If no organ is identified, the mass is considered primary retroperitoneal. Retroperitoneal masses are almost always malignant.
Clues to aid in diagnosis:
Infectious/Inflammatory nodes (Atypical mycobacterium, TB)
- Nishino et al. "Primary Retroperitoneal neoplasms: CT and MR imaging findongs with anatomic and pathologic diagnostic clues" Radiographics 2003 vol. 23 no. 1 45-57
- Sheth. et Al. "Mesenteric Neoplasms: CT Appearances of Primary and Secondary Tumors and Differential Diagnosis" Radiographics 2003 vol. 23 no. 2 457-473
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Case Number: 52338070Last Updated: 06-01-2011 The reader is fully responsible for confirming the accuracy of this content.
The reader is fully responsible for confirming the accuracy of this content.