[Retroperitoneal myxoid liposarcoma of the kidney capsule as a cause of Budd-Chiari syndrome].

A retroperitoneal myxoid liposarcoma of the renal capsule must be differentiated from renal cell carcinomas, angiomyolipomas, fibrogenous lipomas, fibrolipomas and mixed tumours containing fat tissue. Myxoid liposarcomas can lead to intracaval tumour thromboses, which is often the case with renal cell carcinomas and revealed clinical with Budd-Chiari syndrome. Computed tomography and magnetic resonance imaging give additional information in the diagnosis of intracaval tumour thromboses and show the exact expansion of the topographic-anatomical structure.