長期透析患者に発生した下大静脈腫瘍血栓を伴う腎細胞癌の1例

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We report a case of left renal cell carcinoma extending into the inferior vena cava associated with the acquired cystic disease of the kidney (ACDK). The patient was a 46-year-old man, who had been treated with hemodialysis for 12 years. In November 1992, ACDK was observed on computed tomography (CT) for routine check up, but no tumorous lesions were detected. He noticed bleeding from the urethra in May 1994. CT and magnetic resonance imaging (MRI) revealed left renal tumor with intrahepatic vena caval tumor thrombus. There were no findings of distant metastasis. Left radical nephrectomy and partial removal of vena cava were performed. Histopathologically, renal cell carcinoma, pT3b, pN0, stage III was diagnosed.