Background: Urolithiasis is a worldwide problem  due to its high prevalence and  recurrence. Percutaneous nephrolithotomy is a minimally invasive surgical option for the treatment of large renal stone burden greater than 20mm, staghorn calculi and lower pole calyceal stone greater than 10 mm. The objective of this study was to evaluate the safety and  efficacy of percutaneous nephrolithotomy in the management of lower pole calyceal stones. Methods: Seventy  patients who presented in between June 2013 and September 2017 with  lower pole calyceal stones and lower calyceal stones with pelvic extension  were included in the study. The operating time, the hospital stay, complications rate, stone clearance rate were all noted. Patients were followed up in three and six weeks with X-ray KUB and ultrasonography of abdomen.Results: Seventy adult patients with lower pole calyceal stones underwent standard percutaneous nephrolithotomy. The mean age was 32 years (18-71 yrs). The mean stone size was 17.6 mm (15 –28 mm). The mean operating time was 62 minutes (48-124 mins) and hospital stay was 4.1 days(4-8 days). The stone clearance rate was 92.6% for stone <20mm and 90.7% stone size >20 mm. The complications noted were fever (8.5%), transient haematuria (20%), urine leak (5.7%), obstruction by residual fragments (5.7%) and one pseudoaneurysm(1.42%). Seven patients (10%) needed blood transfusion.Conclusions: Percutaneous nephrolithotomy is a safe, feasible and highly effective method for the treatment of lower pole calyceal stones.Keywords: Lower calyx; lower pole stones; percutaneous nephrolithotomy; stone free rate.

Background:  Urolithiasis is a worldwide problem  due to its high prevalence and  recurrence. Percutaneous nephrolithotomy is a minimally invasive surgical option for the treatment of large renal stone burden greater than 20mm, staghorn calculi and lower pole calyceal stone greater than 10 mm. The objective of this study was to evaluate the safety and  efficacy of percutaneous nephrolithotomy in the management of lower pole calyceal stones.Methods: Seventy  patients who presented in between June 2013 and September 2017 with  lower pole calyceal stones and lower calyceal stones with pelvic extension  were included in the study. The  operating time, the hospital stay, complications rate, stone clearance rate were all noted. Patients were followed up in three and six weeks with X-ray KUB and ultrasonography of abdomen.Results: Seventy adult patients with lower pole calyceal stones underwent standard percutaneous nephrolithotomy. The mean age was 32 years (18-71 yrs). The mean stone size was 17.6 mm (15 –28 mm). The mean operating time was 62 minutes (48-124 mins) and hospital stay was 4.1 days(4-8 days). The stone clearance rate was 92.6% for stone <20mm and 90.7% stone size >20 mm. The complications noted were fever (8.5%), transient haematuria (20%), urine leak (5.7%), obstruction by residual fragments (5.7%) and one pseudoaneurysm(1.42%). Seven patients (10%) needed blood transfusion.Conclusions: Percutaneous nephrolithotomy is a safe, feasible and highly effective method for the treatment of lower pole calyceal stones.

Background: Complete staghorn calculus is a challenging issue in urological practice. Anatrophic nephrolithotomy is a major surgery frequently performed for a large complete staghorn calculus. Current endourological procedures like percutaneous nephrolithotomy or extracorporeal lithotripsy or retrograde intra renal surgery are less effective in the management of complete large staghorn calculi. Objectives: The objective of this study is to assess the safety and effi cacy of anatrophic nephrolithotomy in the management of complete large staghorn calculus diseases. Methodology: Total 25 adult patients with complete staghorn calculi from March 2012 to the fi rst week of Sept 2017 were included in the study and were evaluated for patient demography, operating time, blood transfusion rate, cold ischemia time, hospitalization duration, stone clearance rate and the complications. Results: Twenty fi ve adult patients with the mean age of 36 years (26-73years) and the mean stone size of 50 mm (40-65mm) underwent anatrophic nephrolithotomy. Fifteen were male patients and 10 female patients. The mean operating time was 156 minutes (130-210 minutes) and the cold ischemia time was 41 minutes (33-54 minutes). Six patients (24%) needed blood transfusion. The duration of hospital stay was 7.2 days (6-11 days). The stone clearance rate was 88 % at the time of discharge and 96 % at three month follow up. Conclusion: Anatrophic nephrolithotomy is a valid and useful approach and is a reasonable alternative in selected patients with complete large staghorn calculi. It can achieve high stone free rate with very low morbidity and low cost.

Introduction: The horseshoe kidney is extremely rare, the incidence being one in every 400 - 800 patients. In a recent review of more than 15000 radiographic imaging studies, the incidence was one in every 666 patients. The renal stone formation in horseshoe kidney is around 20-80%. Percutaneous nephrolithotomy is the most accepted modality of treatment . This study was carried out to find the outcome of percutaneous nephrolithotomy in horseshoe kidneys. Methods: Between May 2013 and November 2017, 11 adult patients(12 renal units) with stones in horseshoe kidneys underwent percutaneous nephrolithotomy in the department of urosurgery, Kathmandu Medical College and Teaching Hospital and were evaluated for the operating time, stone free rate , complications and hospital stay. Data analysis was done using Statistical Package for the Social sciences (SPSS) Version 20. Categorical data were analysed by using Fisher exact test. Results: The mean age of the patients was 30.9 years (SD = 10.3) and the mean stone burden was 385.83 mm2 (SD = 331.3). The overall stone free rate was 83.33%. The two patients with residual stones when counselled for Extracorporeal shock wave lithotripsy, refused for it and decided to be on follow up. No auxiliary procedure was done. The complications noted were of Clavien-Dindo grade I and II. No pleural or bowel injury was seen. One patient needed blood transfusion. Conclusions: Percutaneous nephrolithotomy is safe and effective in the management of stones in horseshoe kidneys. It does not carry increased risk than reported in normal kidneys.