Retroperitoneal Extraskeletal Osteosarcoma Misconstrued as a Primary Renal Tumor.
10.4111/kju.2006.47.10.1124
- Author:
Byung Hyun SOH
1
;
Woong Kyu HAN
;
Seung Hwan LEE
;
Jieun KWON
;
Woo Ick YANG
;
Seung Choul YANG
Author Information
1. Department of Urology, Urological Science Institute, Yonsei University College of Medicine, Seoul, Korea. syang313@yumc.yonsei.ac.kr
- Publication Type:Case Report
- Keywords:
Osteosarcoma
- MeSH:
Aged, 80 and over;
Giant Cells;
Hemorrhage;
Humans;
Lymph Nodes;
Neoplasm Metastasis;
Nephrectomy;
Osteosarcoma*;
Stromal Cells
- From:Korean Journal of Urology
2006;47(10):1124-1126
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
Extraskeletal osteosarcoma is a rare malignant tumor of the soft tissue. In addition, there are only several reported cases of osteosarcoma of the retroperitoneum as a primary site. We report here on a case of extraskeletal osteosarcoma arising in the retroperitoneum. An 80-year-old man visited our hospital because of a known renal mass. Abdominal computed tomography showed a 10cm sized huge renal mass. We then performed radical nephrectomy. The mass revealed a solid and ivory-colored cut surface with multifocally ovoid cystic spaces and hemorrhage. Microscopically, the tumor consisted of polygonal stromal cells, giant cells and varying amounts of neoplastic new bone; mitotic figures were frequently observed. There was no distant metastasis or regional lymph node involvement.
