Retroperitoneal liposarcoma
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Abdominal mass and weight loss
Patient Data
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Huge right-sided retroperitoneal mass - largely composed of fat, but also several soft tissue components. The mass is displacing the right kidney anteriorly, as well as the liver and bowel anteromedially.
3 case questions available
Q: Are these tumours usually large or small at presentation? show answer
A: Typically large ( > 10 cm ) as presentation only occurs when a palpable mass is identified or when symptoms develop from the mass effect of the large retroperitoneal mass.
Q: What are the characteristic imaging appearances? show answer
A: Appearances can vary, but a retroperitoneal mass, with variable amounts of fat and soft tissue ( can be only small nodules ).
Q: What is the prognosis? show answer
A: Prognosis is poor. Even when surgery is performed there is a high recurrence rate.
Case Discussion
Retroperitoneal liposarcoma is uncommon. It forms one of the spectrum of fat containing retroperitoneal masses, which range from benign to frankly and aggressively malignant lesions.
It contains both fatty and soft tissue elements and is often sizable before presentation. They characteristically displace, rather than infiltrate adjacent structures.
References
- 1. Nishino M, Hayakawa K, Minami M et-al. Primary retroperitoneal neoplasms: CT and MR imaging findings with anatomic and pathologic diagnostic clues. Radiographics. 2003;23 (1): 45-57. Radiographics (full text) - doi:10.1148/rg.231025037 - Pubmed citation
- 2. Craig WD, Fanburg-Smith JC, Henry LR et-al. Fat-containing lesions of the retroperitoneum: radiologic-pathologic correlation. Radiographics. 2009;29 (1): 261-90. Radiographics (full text) - doi:10.1148/rg.291085203 - Pubmed citation
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