長期透析患者にみられた両側腎癌の1例
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55歳男,血液透析開始12年後および15年後にそれぞれ左腎,右腎に多中心発生性の腎細胞癌を認めた.両腎ともに多嚢胞化萎縮腎の状態であり,腎癌以外の組織内に過形成性変化もみられた.透析患者の長期生存が可能となるに従い発癌の頻度も高まるものと推測されるBilateral renal cell carcinoma developing in a 55-year-old male receiving long-term dialysis is reported. The patient, who had undergone maintenance hemodialysis for 12 years, was admitted in July, 1986 for the purpose of extensive examination of a right renal mass. CT scan and ultrasonography demonstrated an enlarged bilateral kidney associated with multiple cysts, containing a solid mass in the right upper pole. The patients underwent right nephrectomy under the diagnosis of right renal tumor. The solid tumor 4 x 3 cm in size revealed a grade 1 to 2 renal cell carcinoma pathologically. Two small tumors were recognized in other portions of the kidney. Multiple cysts of varying sizes, the largest 2 cm in diameter, replaced the renal parenchyma. The cyst walls frequently contained hyperplastic changes. The patient has been subsequently followed up for 2 years and 9 months and underwent left nephrectomy for suspected left renal tumor. The surface of the left kidney was covered by numerous cysts. The result of pathological examination was renal cell carcinoma, which was recognized in a total of 7 regions of the left kidney. The patient remains well on hemodialysis, with no evidence of recurrence or metastasis.
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