Cancer - Bladder, Pelvis, Ureter & Others(구연) Oral Session 5 / Cancer - Bladder, Pelvis, Ureter & Others (Ⅰ) (O-054) Rm.201 10월 30일(수) 15:00-16:00 Holmium laser-assisted laparoscopic partial cystectomy for bladder cancer: technical feasibility and outcome, pilot study 가톨릭대학교 인천성모병원¹ 가톨릭대학교 은평성모병원² 김강섭¹, 서홍진¹, 이동환¹, 최용선² Purpose In selected patients with bladder cancer, partial cystectomy is an alternative treatment for bladder preservation with fair oncologic result. During partial cystectomy, tumor margin demarcation is difficult. Various methods were introduced, however, there is no standard for tumor margin demarcation. We aimed to introduce and provide our experience with holmium laser-assisted method with ten patients. Materials and Methods From March 2016 and February 2018, patients who want partial cystectomy for bladder cancer were enrolled in this study. Inclusion criteria were stage T2 or T3 disease and tumor location restricted within the dome, and lateral, posterior side of the bladder were included. Transurethral holmium laser-assisted mucosal incision was made and deepened until perivesical fat. Minimal Safety margin for 5-10 mm were spared, and tumor removal was done laparoscopically. Results Ten patients underwent holmium laser-assisted laparoscopic partial cystectomy. All procedures done without complication. The tumor locations were lateral in seven patients, dome in two patients, and posterior wall in one patient. Pathologic examination of surgical margin showed no cancer cell involvement in all cases. There were no recurrences or metastases for 12 months follow up. Conclusion To achieve precise and appropriate surgical margin during the laparoscopic partial cystectomy, holmium laser resection provides feasible and safe method that assists in bladder incision with minimal ureteral orifice involvement. keywords : Muscle-invasive bladder carcinoma, Partial cystectomy, Holmium laser