Cystoscopically placed, fluoroscopically guided catheters were used to biopsy 3 solid renal tumors. One kidney had a renal cell carcinoma and 2 had transitional cell carcinoma invading the renal parenchyma, including 1 that had undergone various ureteroscopic biopsy techniques that failed to yield a diagnosis. The transurethral technique offers an alternative to open, laparoscopic or percutaneous biopsy in selected patients.
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Jorge J. Leal (1992) studied this question.