[Diffuse involvement and rapid progression of high-grade transitional carcinoma in a kidney transplant recipient].

In renal transplant patients, an increased risk of cancer has been seen, higher than in the general population, and the more frequent genitourinary neoplasms are the kidney and bladder ones. Moreover, in those patients the pattern of tumor growth is very rapid, with early tendency to local and systemic dissemination. The case here presented, a patient with kidney transplant 3 years before, with high grade, superficial transitional cell carcinoma involving the whole bladder, the pelvis and the ureter of the right native kidney, shown this fast progression. Four months after radical cystectomy plus bilateral nephroureterectomy, the disease progressed to intraperitoneal and hepatic metastases.