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Updated: Jul 13, 2026
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Utilization of Ultrasound Guided Tissue-directed Cellular Implantation for the Establishment of Biologically Relevant Metastatic Tumor Xenografts
Published on: May 25, 2018
Intravenous extended liposarcoma arising from renal sinus
Mabumi Matsushita1, Akihiro Ito, Shigeto Ishidoya
1Department of Urology, Tohoku University Graduate School of Medicine, Sendai, Japan. mabumi@uro.med.tohoku.ac.jp
Summary
This study details a rare case of renal sinus liposarcoma extending into the renal vein lumen. The successful surgical removal highlights a novel treatment approach for this unusual intravascular tumor.
Area of Science:
- Oncology
- Urology
- Pathology
Background:
- Renal sinus liposarcoma is an exceptionally rare malignancy.
- Intravenous extension of renal sinus liposarcoma has not been previously documented.
Observation:
- A 58-year-old woman presented with an incidentally discovered intravascular fatty tumor in the right renal vein.
- Imaging revealed a tumor extending from the renal sinus into the right renal vein, with no distant metastases.
Findings:
- The tumor was identified as a well-differentiated liposarcoma originating from the renal sinus.
- Pathological examination confirmed invasion into the right renal vein and renal parenchyma.
Implications:
- This case expands the known spectrum of renal sinus liposarcoma presentation.
- Surgical extirpation of intravascular renal sinus liposarcoma is feasible and potentially curative.
