A Case of A Retroperitoneal Liposarcoma with Colonic Involvement, Right Nephric Involvement, and Metastatic Lesion of the Breast

Hidefumi Kubo, Shinsuke Kanekiyo, Kousuke Tada and Hiroyasu Hasegawa

Department of Surgery, Tokuyama Central Hospital

A 74-year-old woman with right lateral abdominal pain and a breast tumor in April 2007 was found to have a right perinephric lesion and admitted for further examination and treatment. Abdominal CT disclosed a right perinephric lesion with an unclear margin. Barium enema suggested tumor invasion to the descending colon. Mammography and ultrasonography showed a tumor with a partial unclear margin at C in right breast. Needle biopsy of the breast tumor suggested low-grade malignant potential. Although no definitive diagnosis was made, we conducted laparotomy and found a mesenchymal tumors, necessitating right nephrectomy, partial excision of the descending colon including the tumor, and partial resection of the right breast in May 2007. Histopathological diagnosis was Pleomorphic cell liposarcoma. Histological study showed that the tumor cell had invaded to the submucosal layer of the colon and the resected breast tumor consisted of the same liposarcoma cells suggesting a metastatic tumor.

Key words
loposarcoma, colonic involvement, metastatic breast tumor

Reprint requests
Hidefumi Kubo Department of Surgery, Tokuyama Central Hospital
1-1 Koda-cho, Shyunan, 745-8522 JAPAN

Accepted
September 26, 2007

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