[Ultrasonic diagnosis of the complications of renal transplantation].

To evaluate the usefulness of ultrasound in the diagnosis of urologic complications in renal transplants, we reviewed the ultrasonographic studies performed in 107 renal transplants. Ultrasound disclosed 13 perirenal collection of fluid without hydronephrosis, 4 hydronephrosis without perirenal mass, 2 hydronephrosis from a perirenal fluid mass, 2 urinomas from polar infarction, 1 subcapsular hematoma, and 1 graft vascular atrophy. Ultrasound proved to be the most efficient technique in the diagnosis of hydronephrosis and perirenal fluid collection. Although it does not distinguish the nature of the latter, it permits control of diagnostic or therapeutic (75%) puncture. Moreover, it is useful in controlling percutaneous nephrostomy in transplant obstruction and permits its noninvasive follow-up.