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30歳,男性.検診で行った超音波検査で両腎の腫瘤を指摘され受診.IVPで左腎下極と右腎上極に腫瘤陰影を認め,CT・血管造影等で境界明瞭な腫瘍が描出された.明らかな転移はなく,両側に腫瘍核出術を施行した.病理診断は両側とも淡明細胞型の腎細胞癌grade 1で全周を線維性の偽被膜で覆われていた.術後10ヵ月の現在健在である.本邦報告例中最若年で,両側核出術を受けた例としては3例目であった.核出術の適応について考察した.
A 30-year-old man was admitted to the Tokyo Medical College Hospital for evaluation of the bilateral renal mass revealed by ultrasonography. IVP demonstrated two tumors, one in the left renal lower portion and the other in the right renal upper portion. Renal arteriography and CT showed that the tumors were well circumscribed. Subsequent examinations were negative for metastasis. The encapsulated tumors in each kidney were enucleated in two stages. They were covered all over by fibrous pseudocapsule and clear cell type renal cell carcinoma histopathologically.
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