RESULTS• Mean tract size was 18.2 ± 2 F (15-20) and 26.8 ± 2 F (24-30), P value < 0.0001 in the miniperc and standard PNL, respectively. Holmium LASER and pneumatic lithotripter were the main energy sources used in miniperc and standard PNL, respectively.• Miniperc operative time was longer than that of standard PNL (45.2 ± 12.6 vs 31 ± 16.6 min, P = 0.0008 respectively).• Conversely, there was an advantage of miniperc over standard PNL in terms of a significantly reduced hemoglobin drop (0.8 ± 0.9 vs 1.3 ± 0.4 gram%, P = 0.01), analgesic requirement (55.4 ± 50 vs 70.2 ± 52 mg tramadol, P = 0.29) and hospital stay (3.2 ± 0.8 vs 4.8 ± 0.6 days, P ≤ 0.001), respectively.• Intra-operative conversion of the procedure into a tubeless PNL was significantly more in the miniperc group ( P ≤ 0.001). The miniperc and standard PNL group had clearance rates of 96% and 100%, respectively at 1 month follow up. CONCLUSIONS• This study demonstrated significant advantages of the miniperc procedure in terms of reduced bleeding leading to a tubeless procedure and reduced hospital stay.• The stone free rates and the complications were similar in either group. What's known on the subject? and What does the study add? Standard PNL is known to have higher clearance rates for stones 1-2 cm. However, it is not promoted because of its associated morbidity, especially bleeding. Minitiarization of the PNL has spawned a new interest in this modality for treating small bulk urolithiasis. KEYWORDSThe study adds to a growing body of evidence in a prospective manner that smaller tract PNL "miniperc" is associated with a similiar efficacy of achieving stone-clearance rates while decreasing the invasiveness of the procedure and associated morbidity. OBJECTIVE

In this select group of donors, LESS donor nephrectomy, although challenging to the surgeon with longer warm ischemic times, gave early pain relief with shorter hospital stay and comparable graft function.

OBJECTIVE To report the operative management and subsequent stone‐free rates of patients with urolithiasis in a horseshoe kidney and treated at one centre. PATIENTS AND METHODS We retrospectively reviewed all patients presenting to our centre with a horseshoe kidney and urolithiasis over a 15‐year period. The stone burden, surgical management, complications and stone clearance rates were recorded. RESULTS In all, 55 patients with urolithiasis in horseshoe kidney were treated. Percutaneous nephrolithotomy (PCNL) was used in 60 renal units in 47 patients. Five patients had extracorporeal shock wave lithotripsy (ESWL), two had flexible ureteroscopy and one had a laparoscopic pyelolithotomy for a stone extending into the isthmus. PCNL was used for large stones (mean digitized surface area = 614.32 mm2) and required one to four stages to achieve an overall stone clearance rate of 88%. Stones were cleared at one sitting in 77% of PCNL procedures, completely cleared in two‐thirds of patients treated by ESWL, and in both who had flexible ureteroscopy and the one treated with laparoscopic pyelolithotomy. Complications were minimal, with 15% minor and 3% major complications in the PCNL group only. CONCLUSION Appropriate management of urolithiasis within the horseshoe kidney depends not only on stone burden, but also on stone location, calyceal configuration and malrotation. Stones can be cleared successfully in almost all patients providing that all techniques are available to the operating surgeon.

BackgroundPigment nephropathy represents one of the most severe complications of rhabdomyolysis or hemolysis.MethodsWe performed a retrospective observational study to analyze the etiology, clinical manifestation, laboratory profile and outcome in patients with biopsy-proven pigment-induced nephropathy between January 2011 and December 2016. History, clinical examination findings, laboratory investigations and outcome were recorded.ResultsA total of 46 patients were included with mean follow-up of 14 ± 5.5 months. Mean age was 40.15 ± 12.3 years, 65% were males (male:female, 1.8:1) and ∼37 (80.4%) had oliguria. Mean serum creatinine at presentation and peak creatinine were 7.5 ± 2.2 and 12.1 ± 4.3 mg/dL, respectively. Evidence of rhabdomyolysis was noted in 26 patients (64%) and hemolysis in 20 patients (36%). Etiology of rhabdomyolysis include snake envenomation (10 patients), seizures (7), strenuous exercise (5), wasp sting (2) and rifampicin induced (2). The causes of hemolysis include rifampicin induced (7 patients), sepsis (5), malaria (3), mismatched blood transfusion/transfusion reaction (3) and paroxysmal nocturnal hemoglobinuria (2). On renal biopsy, two patients had acute interstitial nephritis and two had immunoglobulin A deposits in addition to pigment nephropathy. All except one (97.8%) required hemodialysis (HD) during hospital stay and mean number of HD sessions was 9 ± 2. A total of three patients with sepsis/disseminated intravascular coagulation died, all had associated hemolysis. On statistical analysis, there was no difference between AKI due to rhabdomyolysis and hemolysis except for high creatine phosphokinase in patients with rhabdomyolysis and Lactate dehydrogenase level in patients with hemolysis. At mean follow-up, five patients (12%) progressed to chronic kidney disease (CKD).ConclusionsPigment nephropathy due to rhabdomyolysis and hemolysis is an important cause of renal failure requiring HD. The prognosis was relatively good and depends on the etiology; however, long-term studies and follow-up are needed to assess the true incidence of CKD due to pigment nephropathy.

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