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1.  Renal cell carcinoma with a tumor thrombus in the ureter: a case report 
BMC Urology  2011;11:16.
Background
Renal cell carcinoma (RCCs) is the most common malignancy of the kidney. When RCC progresses, it is known to form tumor thrombus in the renal vein and/or inferior vena cava. However, RCC does not normally form tumor thrombus in the ureter or renal pelvis.
Case presentation
A 43-year-old man presented to our department for the treatment of a renal tumor with asymptomatic gross hematuria. In a dynamic CT study, contrast enhancement revealed a tumor suspected to be RCC, but atypical finding as a tumor thrombus that filled the renal pelvis and the whole ureter was also observed. Nephroureterectomy was performed, and the tumor was diagnosed histopathologically as RCC.
Conclusion
We report here a very rare case of RCC with a tumor thrombus in the whole ureter.
doi:10.1186/1471-2490-11-16
PMCID: PMC3161958  PMID: 21806792

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