Mixed epithelial and stromal tumor preoperatively diagnosed as a renal cell carcinoma:A case report Koji Koizumi 1 , Yuji Mimura 1 , Yoshihiro Inoue 1 , Yutaka Yanagisawa 1 1Department of Urology,Omachi Municipal General Hospital Keyword: 囊胞性腎疾患 , 腎腫瘍 pp.261-264
Published Date 2009/3/20
DOI https://doi.org/10.11477/mf.1413101675
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 A 49-year-old woman complaining left lower abdominal pain came to our hospital in July 2007 and was suspected to have a left ureteral stone. Computed Tomography revealed a left ureteral stone and a cystic tumor in her left kidney. We diagnosed the cystic tumor as category Ⅲ tumor under the Bosniak classification. The possibility of cystic renal cell carcinoma could not be denied,therefore a left nephrectomy was performed in September 2007. Histologically,the tumor was mixed epithelial and stromal tumor of the kidney. The patient was free of disease up to her last visit in March 2008.

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