A Case of Retroperitoneal Leiomyosarcoma Resected Completely with Resection of the Left Renal Vein Preserving Collateral Flow

Nobuyoshi Kittaka, Motoi Kondo, Shoji Nakamori, Masakazu Ikenaga, Hiroaki Nagano, Keizo Dono, Koji Umeshita, Kenichi Wakasa^*, Masato Sakon and Morito Monden

Department of Surgery and Clinical Oncology, Graduate School of Medicine, Osaka University
Department of Pathology, Osaka City University Hospital^*

A 69-year-old woman admitted with left upper abdominal pain was found by preoperative abdominal computed tomography to have an 8cm retroperitoneal tumor. Left renal angiography showed that the tumor obstracted the left renal vein and the left kidney was drained by collateral vessels into the hemiazygos vein. We completely resected the tumor and the left renal vein, preserving collateral flow into the hemiazygos vein. Microscopically, spindle-shaped tumor cells were tightly arranged. Immunohistochemistry showed the tumor to be positive for smooth muscle actin and desmin, and negative for S-100 and c-kit. The final pathological diagnosis was retroperitoneal leiomyosarcoma. The patient had no postoperative renal dysfunction, and no evidence of recurrence or metastasis has been seen in the 18 months after surgery.

Key words
retroperitoneal leiomyosarcoma, left renal vein resection

Reprint requests
Shoji Nakamori Department of Surgery and Clinical Oncology, Graduate School of Medicine, Osaka University E-2, 2-2 Yamadaoka, Suita, 565-0871 JAPAN

Accepted
November 27, 2001

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