tomy for T1 stage renal cell carcinoma of a solitary kidney. Materials and Methods: Selected in the present study were 56 patients with renal cell carcinoma (RCC) in a solitary kidney, including 41 males and 15 females with a mean of 49 years. B-ultrasound and CT revealed T 1 N 0 M 0 tumors in 51 cases and T 2 N 0 M 0 tumors in the remaining 5 cases. 41 cases of RCC were in the left kidney, and 15 in the right kidney. of them, 24 cases located in the upper pole, 24 in the inferior pole and 8 in the central kidney. The mean tumor diameter was 3.00.8 cm (1.5-5.5 cm). Transperitoneal laparo- scopic nephron-sparing surgery was per- formed via a retroperitoneal approach. Surgical resection was performed along a resection line 0.5 cm from the tumors. Renal function was determined by ECT before and after operation. Preoperative 3-D CT image reconstruction was per- formed by MECT (lightspeed plus 64) in all patients. Results: All procedures were successfully performed without open conversion and serious complications. The mean warm ischemia time was 244.2 min (19-50 min). The mean operation time was 9514.5 min. The mean blood loss was 10520.4 ml, and only 8 patients re- ceived 400 ml transfusion. Double-J stent was placed in 8 patients before operation and 9 patients with intraoperative expo- sure of the renal pelvis. No postoperative urine leakage occurred. Both serum creati- nine (SCR) and nitrogen (N) were normal after operation in all cases. The mean hos- pital stay was 92 days. There was no requirement for hemadialysis. No recur- rence, metastasis and implantation were observed during the 204 months fol- low-up periods, with a survival rate of 100%. Conclusion: Laparoscopic partial ne- phrectomy can be performed safely and effectively in selected patients with tu- mors in a solitary kidney owing to its min- imal invasion, clear dissection, little hem- orrhage and rapid recovery. UP-2.106 Modified Combined Endoscopic Nephroureterectomy for Upper-Tract Urothelial Cancer (Report of 6 Cases) Zou X, Yuan Y, Wang X Department of Urology, First Affiliated Hospital of Gannan Medical University, Ganzhou, China Introduction and Objective: To evaluate the efficiency and safety of modified com- bined endoscopic nephroureterectomy for upper-tract urothelial cancer. Materials and Methods: Six patients suf- fered upper urinary tract cancer under- went modified combined endoscopic nephroureterectomy. Of the 6 cases 4 are men and 2 are women; age range 4566 years; mean 52 years; 3 had pelvic tumors and 2 had ureteral tumors; and one had both pelvic and ureteral tumor. Two cases had tumors on the right side and 4 on the left. First we used needle electrode to cir- cleround incise the bladder thoroughly 0.5 cm away from the ureter orifice un- derwent pneumocystoscope, establish a 10mm percutaneous bladder trocar and use a Hem-O-Lock from the trocar to li- gate the distal of ureteral. Then change the side-lying position, three trocars in the waist were used for dissecting the kidney and ureter. Results: All the patients were successful. The operative time was 85140mins and the blood loss was 50180ml. The mean hospital stay was 8 days and no serious complications happened. Postoperative pathology confirmed transitional cell carci- noma in 6 cases, with squamous cell car- cinoma in 1 case. Postoperative vesical irrigation was performed to prevent tu- mor recurrence. Follow-up of 315 months, no metastasis or recurrence was found in all 6 patients. Conclusion: The ureteral orifice is closed early with Hem-O-Lock under pneumove- sicum for modified combined endoscopic nephroureterectomy, and the chance of cancer-cell spillage and transplantation is minimized by the use of gas instead of liquid in the bladder. Moreover, the pro- cedure is to be clinical application. UP-2.107 Retroperitoneal Laparoscopic Dismembered Pyeloplasty: Also Suitable for an Infant? Bi Y, Ruan S, Lu Y, Wang X, Liu Y, Ge L Children’s Hospital of Fudan University, Shanghai, China Introduction and Objective: Experience with retroperitoneal laparoscopic dismem- bered pyeloplasty for the correction of ureteropelvic junction obstruction is ex- tremely limited in infants. We review our experience with this technique in both children and infants to evaluate its role in the latter group. Materials and Methods: The hospital records of patients who underwent retro- peritoneal laparoscopic dismembered py- eloplasty for UPJO between November 2003 and November 2008 were reviewed. The patients were divided into two groups, as follows: 1) those who were  2 years of age were included in the infant group (group 1), and 2) those  2 years of age were in the children group (group 2). All of the patients were evaluated for UPJO by ultrasound, DTPA renography, and IVP. The age, operative time, days for hospital stay, and success rate were re- viewed separately in the two groups. The Student t-test was used for statistical analy- sis. Results: Sixty-eight patients were identi- fied, all of whom were treated by retro- peritoneal laparoscopic dismembered py- eloplasty. Twenty-nine patients were in group 1, and 39 patients were in group 2. There was 1 case which was converted in group 1, and 2 cases were converted in group 2. There were 2 cases of anastomo- sis stenosis in group 2. The operative time was 2.5-4.0 h for group 1 (mean, 3.3 h) and 2.5-4.5 h (mean, 2.9 h) for group 2. The length of hospital stay was 5.6 days in group 1 and 5.4 days in group 2. The difference in operative times and length of hospital stay were not statistically dif- ferent. Conclusions: Our series of patients un- dergoing laparoscopic pyeloplasty had good results in both children and infants. We consider this technique suitable for correction of UPJO in pediatric patients, and even in infants, although more cases are required to establish the usefulness in infants. UP-2.108 Bladder Function in Children with Posterior Urethral Valve: Multicenter Study Wadie B 1 , El- Hefnawy A 1 , Sarhan O 1 , El Ghoneimi A 2 1 Mansoura Urology and Nephrology Cen- ter, Mansoura, Egypt; 2 Robert Debre ´ Chil- dren’s Hospital, Paris, France Introduction and Objective: Posterior urethral valve is a leading cause of bladder dysfunction. After valve fulgeration, major- ity of children maintain voiding symp- toms, attributable to multiplicity of patho- logic entities. Urologic literature is lacking detailed description of these entities. Materials and Methods: 53 children were evaluated. 30 of them were seen in center 1, and 23 were seen in center 2. Mean age was 7.72 (range: 4-16 years). Evaluation included clinical examination, renal US, VCUG and filling and voiding cystometry. Urodynamic testing was per- formed at a mean of 3.9 days (range 1-10 days) after fulguration of the valve. 6 F double lumen catheter was used with a filling rate of 10-20 ml/minute (according to the expected capacity). Voiding was UNMODERATED POSTER SESSIONS S264 UROLOGY 74 (Supplment 4A), October 2009