[Oncocytic cell tumor. Problems, diagnosis, therapy]. / Tumor de células oncocíticas. Problemática, diagnóstico-terapéutica.

Renal oncocytoma is an uncommon tumor. At least 203 such cases have been reported. This urologic condition represents a diagnostic difficulty and because its natural history has not been elucidated, its treatment remains a controversy. Two recent cases of renal oncocytoma seen at our Urology Service prompted us to review the literature and analyze the diagnostic methods, therapeutic approach and its prognosis.

[Echographic studies in renal transplant. Our experience]. / Los estudios ecográficos en el trasplante renal. Nuestra experiencia.

The present study briefly reports our experience in the evaluation of renal transplantation by conventional and pulsed Doppler ultrasound. We advocate the use of both imaging techniques in these patients because these are safe, reliable, easy-to-use, reproducible noninvasive imaging techniques that afford a high diagnostic yield.