Clear Cell Carcinoma of the Bladder in a Patient With a Earlier Clear Cell Renal Cell Carcinoma: A Case Report With Morphologic, Immunohistochemical, and Cytogenetical Analysis

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Clear cell transitional carcinoma of the bladder is a subtype of transitional carcinoma that morphologically resembles a clear cell renal cell carcinoma. Although kidney tumors do not frequently metastasize to the bladder, the recurrence after a clear cell renal cell carcinoma has been reported even several years after nephrectomy. We report the case of a male patient to whom radical nephrectomy for a clear cell renal cell carcinoma has been done, with a bladder tumor featuring polygonal cells with abundant clear cytoplasm deeply infiltrating the vesical wall. We discuss the morphologic features, the immunohistochemical staining with a new marker and the UroVysion FISH analysis to achieve a definitive diagnosis.

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