Case reportSarcomatoid carcinoma of transitional cell origin confined to renal pelvis
Section snippets
Case report
A 61-year-old man presented to our clinic for consultation regarding gross painless hematuria. The patient’s medical history was significant only for hypertension. He had no previous history of stone disease, infection, or radiation. The patient denied past tobacco use or analgesic abuse. His urine culture was negative, and urine cytology showed no signs of malignant or atypical cells. Computed tomography (CT) with excretory urography was performed and demonstrated a large, left-sided renal
Comment
Most renal pelvis malignancies consist of transitional cell carcinoma. Sarcomatoid carcinoma of transitional cell origin in the renal pelvis is rare and only 13 cases have been reported since 1961.1
The sarcomatoid renal pelvic tumor of transitional cell origin should not be confused with sarcomatoid renal cell carcinoma, a well-described, high-grade malignant variant of renal parenchyma origin.2 Sarcomatoid carcinoma is often confused with, and difficult to distinguish from, carcinosarcoma.
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Sarcomatoid transitional cell carcinoma originating from a duplicated renal pelvis
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