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Updated: Apr 25, 2026
A Syngeneic Mouse Model of Metastatic Renal Cell Carcinoma for Quantitative and Longitudinal Assessment of Preclinical Therapies
Published on: April 12, 2017
Long term survival in a case of concurrent retroperitoneal liposarcoma and renal cell carcinoma: a case report
Senji Hoshi, Natuho Hayashi, Mayu Yagi
1Department of Urology, Niigata Cancer Center Hospital, Kawagishi-cho 2-15-3, Chuo-ku, Niigata-shi 951-8566, Japan. vbilim@niigata-cc.jp.
Background:
Liposarcoma is one of the most common soft tissue sarcomas found in adults. It has a predilection for retroperitoneal space. Renal cell carcinoma is the most common tumor of the kidney.
Case Presentation:
Concurrent retroperitoneal liposarcoma and renal cell carcinoma were found in a 34-year-old Japanese man. The renal tumor was first detected by ultrasonography, it was confirmed by computed tomography, which also identified a presumptive retroperitoneal liposarcoma, and the tumors were further assessed with magnetic resonance imaging. The patient was treated by surgical resection of retroperitoneal liposarcoma and left nephrectomy and has been disease-free for 10 years.
Conclusions:
The concomitant occurrence of a renal tumor and a primary primary liposarcoma is rare. The major factors promoting a good prognosis in this case were the favorable histology and the small size of the tumors.
