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Renal calculi

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https://www.readbyqxmd.com/read/28324714/association-between-nephrolithiasis-and-fatty-liver-detected-on-non-enhanced-ct-for-clinically-suspected-renal-colic
#1
Abdel-Rauf Zeina, Limor Goldenberg, Alicia Nachtigal, Rabea Hasadia, Walid Saliba
PURPOSE: To estimate a direct association between nephrolithiasis and hepatosteatosis in patients referred to CT due to clinical suspicion of renal colic. METHODS: A 508 non-contrast CT scans were examined for calculi in the kidneys or urinary tract, including measurements of liver attenuation, spleen attenuation, thickness of visceral and subcutaneous fat. Logistic regression examined the association of nephrolithiasis and hepatosteatosis findings. RESULTS: Nephrolithiasis was found in 421 (83...
March 16, 2017: Clinical Imaging
https://www.readbyqxmd.com/read/28321250/percutaneous-nephrolithotomy-under-ultrasound-guidance-in-patients-with-renal-calculi-and-autosomal-dominant-polycystic-kidney-disease-a-report-of-11-cases
#2
Xiao Wang, Xuecheng Yang, Xiulong Zhong, Zhenlin Wang, Senyao Xue, Weifeng Yu, Zhen Dong
Nephrolithiasis accelerates the renal failure in the patients with ADPKD. In order to evaluate the role of percutaneous nephrolithotomy in management of calculus in these patients, 11 patients with autosomal dominant polycystic kidney disease and renal stones were included in the study. Two patients had bilateral renal stones. All patients were treated by percutaneous nephrolithotomy under ultrasound guidance. 13 percutaneous nephrolithotomy procedures were performed in 1 stage by the urology team under ultrasound guidance...
2017: Advances in Urology
https://www.readbyqxmd.com/read/28303631/surgical-outcomes-of-percutaneous-nephrolithotomy-pcnl-in-3-402-patients-and-results-of-stone-analysis-in-1-559-patients-from-a-single-centre-in-pakistan
#3
S A H Rizvi, M Hussain, S H Askari, M Lal, M N Zafar
OBJECTIVE: To report our experience of a series of PCNL from a single centre over the last 18 years in terms of patients and stone characteristics, indications, stone clearance and complications and chemical analysis of stones in a subgroup. PATIENTS AND METHODS: We retrospectively analysed the outcomes of PCNL in 3,402 adult patients who underwent the procedure between 1997 and 2014 from a prospectively maintained database. Data analysis included patients' age, sex, laboratory investigations, imaging, punctured calyx, duration of operation, volume of irrigation fluid, radiation exposure time, blood transfusion, complications and stone free status at one-month follow-up...
March 16, 2017: BJU International
https://www.readbyqxmd.com/read/28303335/treatment-selection-for-urolithiasis-percutaneous-nephrolithomy-ureteroscopy-shock-wave-lithotripsy-and-active-monitoring
#4
Mahesh Desai, Yinghao Sun, Noor Buchholz, Andrew Fuller, Tadashi Matsuda, Brian Matlaga, Nicole Miller, Damien Bolton, Mohammad Alomar, Arvind Ganpule
Urolithiasis is a significant worldwide source of morbidity, constituting a common urological disease that affects between 10 and 15% of the world population. Recent technological and surgical advances have replaced the need for open surgery with less invasive procedures. The factors which determine the indications for percutaneous nephrolithotomy include stone factors (stone size, stone composition, and stone location), patient factors (habitus and renal anomalies), and failure of other treatment modalities (ESWL and flexible ureteroscopy)...
March 16, 2017: World Journal of Urology
https://www.readbyqxmd.com/read/28301210/update-of-dual-energy-ct-applications-in-the-genitourinary-tract
#5
Ravi K Kaza, Lakshmi Ananthakrishnan, Avinash Kambadakone, Joel F Platt
OBJECTIVE: Dual-energy CT (DECT) is being increasingly used for abdominal imaging because it provides incremental benefit of material characterization without significant increase in radiation dose. This article provides an overview of current DECT techniques and use of DECT in urinary tract imaging for assessment of renal masses and urinary calculi characterization and in CT urography. CONCLUSION: Incorporation of DECT into clinical practice and use of its material characterization capabilities in urinary tract imaging enable characterization of urinary calculi and incidental renal lesions and can reduce radiation dose by allowing generation of virtual unenhanced images...
March 16, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28299446/do-renal-stones-that-fail-lithotripsy-require-treatment
#6
Ben Pullar, Catherine Lunter, Jane Collie, Syed Shah, Nimish Shah, Sami Hayek, Oliver J Wiseman
The rates of extracorporeal shock wave lithotripsy (SWL) appear stable in the UK. However, there is little evidence on the natural history of these calculi if SWL fails. We set to look at the effectiveness of SWL in patients with a single, previously untreated renal stone and the natural history of those stones that failed treatment. We retrospectively reviewed all data from our prospectively collected database of patients undergoing a first treatment for a single renal stone between October 2010 and November 2013...
March 15, 2017: Urolithiasis
https://www.readbyqxmd.com/read/28296764/case-report-of-primary-renal-pelvis-squamous-cell-carcinoma-coexisting-with-long-standing-calculi-in-left-kidney-on-18f-fdg-pet-ct
#7
Shengming Deng, Bin Zhang, Ying Huang, Jihui Li, Shibiao Sang, Wei Zhang
RATIONALE: Primary renal pelvis squamous cell carcinoma (SCC) is an extremely rare neoplasm. In many patients, the SCC was associated with renal calculi. PATIENT CONCERNS: A 61-year-old male presented with intermittent pain at the left lumbar region for 3 days. The PET/CT images demonstrated increased F-FDG uptake in the upper pole of the left kidney and left renal hilar lymph nodes. DIAGNOSES: Pathologic examination revealed well-moderately differentiated renal pelvis SCC with lymphatic metastasis...
March 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28289943/intra-patient-comparison-of-reduced-dose-model-based-iterative-reconstruction-with-standard-dose-adaptive-statistical-iterative-reconstruction-in-the-ct-diagnosis-and-follow-up-of-urolithiasis
#8
Sean Tenant, Chun Lap Pang, Prageeth Dissanayake, Varut Vardhanabhuti, Colin Stuckey, Catherine Gutteridge, Christopher Hyde, Carl Roobottom
OBJECTIVES: To evaluate the accuracy of reduced-dose CT scans reconstructed using a new generation of model-based iterative reconstruction (MBIR) in the imaging of urinary tract stone disease, compared with a standard-dose CT using 30% adaptive statistical iterative reconstruction. METHODS: This single-institution prospective study recruited 125 patients presenting either with acute renal colic or for follow-up of known urinary tract stones. They underwent two immediately consecutive scans, one at standard dose settings and one at the lowest dose (highest noise index) the scanner would allow...
March 13, 2017: European Radiology
https://www.readbyqxmd.com/read/28275511/can-percutaneous-nephrolithotomy-be-performed-as-an-outpatient-procedure
#9
Ahmed Fahmy, Hazem Rhashad, Omer Algebaly, Wael Sameh
OBJECTIVES: To examine the safety and effectiveness of percutaneous nephrolithotomy (PCNL) as an outpatient procedure, as in most centres PCNL is performed as an inpatient procedure that necessitates postoperative hospital admission. PATIENTS AND METHODS: Our study included 186 patients undergoing PCNL for renal calculi. Only those who met strict inclusion criteria were discharged home on the same day. Preoperative eligibility criteria for outpatient management included no complex medical problem, normal renal function, and easy access to an emergency room...
March 2017: Arab Journal of Urology
https://www.readbyqxmd.com/read/28271171/histological-and-ultrastructural-characterization-of-alkaptonuric-tissues
#10
Lia Millucci, Giulia Bernardini, Adriano Spreafico, Maurizio Orlandini, Daniela Braconi, Marcella Laschi, Michela Geminiani, Pietro Lupetti, Giovanna Giorgetti, Cecilia Viti, Bruno Frediani, Barbara Marzocchi, Annalisa Santucci
Alkaptonuria (AKU) is a hereditary disorder that results from altered structure and function of homogentisate 1,2 dioxygenase (HGD). This enzyme, predominantly produced by liver and kidney, is responsible for the breakdown of homogentisic acid (HGA), an intermediate in the tyrosine degradation pathway. A deficient HGD activity causes HGA levels to rise systemically. The disease is clinically characterized by homogentisic aciduria, bluish-black discoloration of connective tissues (ochronosis) and joint arthropathy...
March 7, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28263129/profile-of-metabolic-and-infectious-stone-formers-in-a-contemporary-pcnl-cohort
#11
Benjamin J King, Caleb J Seufert, Zhamshid Okhunov, Nazih Khater, D Duane Baldwin, Peter W Callas, Kevan M Sternberg
INTRODUCTION: To identify factors associated with stone composition in patients undergoing percutaneous nephrolithotomy (PCNL). MATERIAL AND METHODS: A retrospective analysis of patients who underwent PCNL at two academic institutions between 2002 and 2014. Stone composition, stone characteristics based on non-contrast computer tomography (NCCT), patient demographics, and the S.T.O.N.E nephrolithometry scores were compared. Stones were characterized as either infection or metabolic...
February 2017: Canadian Journal of Urology
https://www.readbyqxmd.com/read/28261679/can-a-brief-period-of-double-j-stenting-improve-the-outcome-of-extracorporeal-shock-wave-lithotripsy-for-renal-calculi-sized-1-to-2-cm
#12
Rakesh Sharma, Arpan Choudhary, Ranjit Kumar Das, Supriya Basu, Ranjan Kumar Dey, Rupesh Gupta, Partha Pratim Deb
PURPOSE: Extracorporeal shock wave lithotripsy (ESWL) is an established modality for renal calculi. Its role for large stones is being questioned. A novel model of temporary double J (DJ) stenting followed by ESWL was devised and outcomes were assessed. MATERIALS AND METHODS: The study included 95 patients with renal calculi sized 1 to 2 cm. Patients were randomized into 3 groups. Group 1 received ESWL only, whereas group 2 underwent stenting followed by ESWL. In group 3, a distinct model was applied in which the stent was kept for 1 week and then removed, followed by ESWL...
March 2017: Investigative and Clinical Urology
https://www.readbyqxmd.com/read/28258472/prevalence-of-renal-uric-acid-stones-in-the-adult
#13
Alberto Trinchieri, Emanuele Montanari
The aim of this study was to estimate uric acid renal stone prevalence rates of adults in different countries of the world. PubMed was searched for papers dealing with "urinary calculi and prevalence or composition" for the period from January 1996 to June 2016. Alternative searches were made to collect further information on specific topics. The prevalence rate of uric acid stones was computed by the general renal stone prevalence rate and the frequency of uric acid stones in each country. After the initial search, 2180 papers were extracted...
March 3, 2017: Urolithiasis
https://www.readbyqxmd.com/read/28256207/androgen-deprivation-therapy-in-prostate-cancer-and-risk-of-developing-renal-calculi-results-of-a-case-control-study
#14
Enrique Javier Díaz Convalía, María Del Carmen Cano-García, José Luis Miján-Ortiz, Miguel Arrabal-Martín, Miguel Ángel Arrabal-Polo, José Manuel Cózar-Olmo
BACKGROUND AND OBJECTIVE: Androgenic deprivation therapy in prostate cancer is associated with the onset of different adverse effects, including osteoporosis and metabolic syndrome. Both are related to the onset of nephrolithiasis. The objective of this article is to study the incidence of renal stones in patients undergoing androgen deprivation therapy with LHRH analogue. PATIENTS AND METHODS: Case-control study including a total of 85 patients divided into 2 groups: group 1, with 41 patients on androgen deprivation therapy, and group 2, with 44 patients not receiving androgen deprivation therapy...
February 27, 2017: Medicina Clínica
https://www.readbyqxmd.com/read/28255156/ex-vivo-removal-of-stones-in-donor-kidneys-by-flexible-ureteroscopy-prior-to-renal-transplantation-a-case-report
#15
Na Wang, Honglan Zhou, Bo Shi, Jinguo Wang
BACKGROUND Because of the shortage of grafts, many attempts have been made to treat calculi in donor kidneys and have achieved successful management. This case report is the first to present removal of stones from bilateral kidneys from a single donor through flexible ureteroscopy before transplantation. CASE REPORT The present case report shows the clinical management of bilateral donor kidneys with calculi, which were taken from a 33-year-old man through donation after cardiac death (DCD). Computed tomography showed 2 stones in the right donor kidney and 1 in the left donor kidney...
March 3, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/28245870/multi-tract-percutaneous-nephrolithotomy-combined-with-ems-lithotripsy-for-bilateral-complex-renal-stones-our-experience
#16
Taisheng Liang, Chenming Zhao, Gang Wu, Botao Tang, Xiangdong Luo, Shangguang Lu, Yu Dong, Huan Yang
BACKGROUND: The treatment of bilateral complex renal stones is a tough challenge for urologists. This study aimed to evaluate the efficiency and safety of bilateral ultrasonography-guided multi-tract percutaneous nephrolithotomy (PCNL) combined with EMS lithotripsy for the treatment of such cases. METHODS: Twenty-seven patients suffering from bilateral complex renal calculi underwent t bilateral multi-tract PCNL. The PCNL began with the establishment of percutaneous nephrostomy access, which was achieved under ultrasound guidance followed by stone fragment and removal by EMS lithotripsy...
February 28, 2017: BMC Urology
https://www.readbyqxmd.com/read/28237786/tract-sizes-in-miniaturized-percutaneous-nephrolithotomy-a-systematic-review-from-the-european-association-of-urology-urolithiasis-guidelines-panel
#17
Yasir Ruhayel, Abdulkadir Tepeler, Saeed Dabestani, Steven MacLennan, Aleš Petřík, Kemal Sarica, Christian Seitz, Andreas Skolarikos, Michael Straub, Christian Türk, Yuhong Yuan, Thomas Knoll
CONTEXT: Miniaturized instruments for percutaneous nephrolithotomy (PNL), utilizing tracts sized ≤22 Fr, have been developed in an effort to reduce the morbidity and increase the efficiency of stone removal compared with standard PNL (>22 Fr). OBJECTIVE: We systematically reviewed all available evidence on the efficacy and safety of miniaturized PNL for removing renal calculi. EVIDENCE ACQUISITION: The review was performed according to the Preferred Reporting Items for Systematic Reviews and Meta-analyses statement...
February 22, 2017: European Urology
https://www.readbyqxmd.com/read/28229197/minimally-invasive-percutaneous-nephrolithotomy-vs-standard-pcnl-for-management-of-renal-stones-in-the-flank-free-modified-supine-position-single-center-experience
#18
Ahmed Sakr, Emad Salem, Mostafa Kamel, Esam Desoky, Ahmed Ragab, Mohamed Omran, Amr Fawzi, Ashraf Shahin
To assess the safety and efficacy of minimally invasive percutaneous nephrolithotomy (mPCNL) as compared to standard PCNL (sPCNL) for management of 2-3-cm renal stones in the flank-free modified supine position. Between September 2010 and December 2013, 150 patients (168 renal units) with 2-3-cm renal stones were prospectively randomized into two treatment groups; Group A (75 patients/87 renal units) treated by mPCNL and Group B (75 patients/81 renal units) treated by sPCNL. In both groups, the patients were placed in the flank-free modified supine position...
February 22, 2017: Urolithiasis
https://www.readbyqxmd.com/read/28228880/crossed-nonfused-renal-ectopia-with-variant-blood-vessels-a-rare-congenital-renal-anomaly
#19
Nawal Ebrahim Al-Hamar, Khalid Khan
Crossed renal ectopia is a rare congenital anomaly, where one of the kidneys crosses the midline and lies opposite to the site of its normal ureteral insertion. Ninety percent of crossed ectopic kidneys are fused to their ipsilateral uncrossed kidney. Crossed renal ectopia without fusion is rare. We present the case of a 53-year-old male with an unusual incidental finding of crossed nonfused renal ectopia, with the left ectopic kidney lying anterior to the right kidney without fusion. The ectopic kidney had dual arterial supply: one from the aorta and another from the right renal artery...
March 2017: Radiology case reports
https://www.readbyqxmd.com/read/28222205/complex-cystine-kidney-stones-treated-with-combined-robot-assisted-laparoscopic-pyelolithotomy-and-intraoperative-renoscopy
#20
Luca Meggiato, Francesco Cattaneo, Fabio Zattoni, Fabrizio Dal Moro, Paolo Beltrami, Filiberto Zattoni
INTRODUCTION: Cystinuria, a rare autosomal recessive disease characterized by a defect in cystine renal reabsorption, can often determine complex cystine renal calculi, leading to important complications such as urinary obstruction, urinary infections, and impaired kidney function. Complex kidney stones can have a difficult management and can be very arduous to treat. CASE DESCRIPTION: We present the case of a 20-year-old Jeowah's witness woman with complex cystine renal stones treated with combined robot-assisted laparoscopic pyelolithotomy and intraoperative renoscopy...
February 18, 2017: Urologia
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