Abstract:

Objective: To investigate the clinical effect of minimally invasive percutaneous nephrolithotomy (mPCNL) in treatment of
renal calyceal diverticular calculi. Methods: Patients with a symptomatic calyceal diverticular calculi were underwent mPCNL under
ultrasound and X-ray guidance, the percutaneous renal access were setup succeedly and the stones were smashed, and we use two
methods for the diverticulum treatment according to the condition of patients: dilation the diverticular neck or fulguration of
diverticular sac wall. Total 18 cases of clinical data were conducted retrospectively analysis. Results: All 18 cases were applied with
percutaneous therapy successfully in the first time. The operative time was 45-120 （65.8±7.89）min, and no severe complications
found. The follow-up time was 3 to 24 months, diverticulum was disappeared in 9 cases and reduced obviously in 8 cases. Stone
recurrenceed in 1 case with conservative observation. Conclusion: mPCNL is an effective and feasible treatment option for
symptomatic caliceal divertivular calculi. The percutaneous approach and infundibular neck treatment are keys to success rate of
operation.

Key words: minimally invasive, percutaneous nephrolithotomy, calyceal diverticular calculi