Materials and Methods: Between 2009 and 2010, cystography and pericatheter RGU was performed in 113 patients who underwent radical prostatectomy on POD 3 and 7 to reveal the presence of extravasation. If anastomotic extravasation was showed by both tests on POD 7, we performed the follow-up imaging study until there was no sign of the contrast extravasation.

Results: The mean age of the study population was 66.0±6.1 years(range 51-82). The number of the patients who showed no extravasation on POD 3 and 7 were 81 and 96 patients, respectively. In cases of extravasation on POD 3, 2 patients showed only on cystography, 3 patients only on pericatheter RGU and 27 patients on both images. In cases of extravasation on POD 7, 3 patients showed only on cystography, 2 patients only on pericatheter RGU and 12 patients on both images. The 244 pairs of total 259 pairs(94.2%) showed concordant results on both imaging studies. There was no significant difference in extravasation rates between the two operation methods

Conclusions: Our study showed that both tests provided similar results in all patients. However, because cystography is more simplicity, and less affected by technique, we suggest that cystography is more preferable. Because of the false negative results and the potential for disruption, we currently recommend delaying catheter removal until postoperative day 7 or later. (Korean J Urol Oncol 2011;9:17-22)