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Demirtas F, Çakar N, Özçakar ZB, Akıncı A, Burgu B, Yalçınkaya F. Risk factors for recurrence in pediatric urinary stone disease. Pediatr Nephrol 2024; 39:2105-2113. [PMID: 38273078 PMCID: PMC11147915 DOI: 10.1007/s00467-024-06300-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 12/24/2023] [Accepted: 01/12/2024] [Indexed: 01/27/2024]
Abstract
BACKGROUND Children's urinary system stones may develop from environmental, metabolic, anatomical, and other causes. Our objective is to determine the recurrence and prognosis, demographic, clinical, and etiological characteristics of children with urolithiasis. METHODS Medical records of patients were evaluated retrospectively. Patients' demographic data and medical history, serum/urine biochemical and metabolic analysis, blood gas analysis, stone analysis, imaging findings, and medical/surgical treatments were recorded. RESULTS The study included 364 patients (male 187). Median age at diagnosis was 2.83 (IQR 0.83-8.08) years. The most common complaints were urinary tract infection (23%) and urine discoloration (12%). Sixty-two percent had a family history of stone disease. At least one metabolic disorder was found in 120 (88%) of 137 patients having all metabolic analyses: hypercalciuria was found in 45%, hypocitraturia in 39%, and hyperoxaluria in 37%. Anatomical abnormalities were detected in 18% of patients. Of 58 stones analyzed, 65.5% were calcium and 20.6% were cystine stones. Stone recurrence rate was 15% (55/364). Older age (> 5 years), family history of stone disease, stone size (≥ 5 mm), and urinary system anatomical abnormalities were significantly associated with stone recurrence (p = 0.027, p = 0.031, p < 0.001, and p < 0.001, respectively). In adjusted logistic regression analysis, stone size ≥ 5 mm (OR 4.85, 95% CI 2.53-9.3), presence of urinary system anatomical abnormalities (OR 2.89, 95% CI 1.44-5.78), and family history of stone disease (OR 2.41, 95% CI 1.19-4.86) had increased recurrence rate. CONCLUSIONS All children with urolithiasis should be evaluated for factors affecting stone recurrence. Children at higher risk of recurrence need to be followed carefully.
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Affiliation(s)
- Ferhan Demirtas
- Department of Pediatrics, Ankara University School of Medicine, Ankara, Turkey.
| | - Nilgün Çakar
- Division of Pediatric Nephrology, Department of Pediatrics, Ankara University School of Medicine, Ankara, Turkey
| | - Zeynep Birsin Özçakar
- Division of Pediatric Nephrology, Department of Pediatrics, Ankara University School of Medicine, Ankara, Turkey
| | - Aykut Akıncı
- Department of Pediatric Urology, Ankara University School of Medicine, Ankara, Turkey
| | - Berk Burgu
- Department of Pediatric Urology, Ankara University School of Medicine, Ankara, Turkey
| | - Fatoş Yalçınkaya
- Division of Pediatric Nephrology, Department of Pediatrics, Ankara University School of Medicine, Ankara, Turkey
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Öner N, Baştuğ F, Özkan B, Özçatal M, Karakükçü Ç. Urolithiasis in children; The importance of stone localization in treatment and follow-up. Urolithiasis 2024; 52:17. [PMID: 38165472 DOI: 10.1007/s00240-023-01518-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Accepted: 12/01/2023] [Indexed: 01/03/2024]
Abstract
To evaluate the demographic, etiologic, treatment, and follow-up differences in stones according to their location within the kidney. This retrospective study comprised 337 patients with urolithiasis between 2015 and 2019. Patients were classified into 2 groups according to stone location as lower pole stones (LPS) and upper-middle pole stones (UMPS). The patient's data were recorded at 3-month intervals for one year. One hundred and eighty-three (54.3%) female and 154 (45.7%) men were included in the study. One hundred and twenty-nine (38.3%) of the stones were in the LPS and 208 (61.7%) in the UMPS. UMPS was more common in patients aged > 12 months (p < 0.01). At least one metabolic risk factor was present in 93 (72.1%) patients with LPS and 164 (78.4%) with UMPS. The most common urinary metabolic risk factors were hyperoxaluria (31.8%) in patients with LPS and hypocitraturia (34.1%) in patients with UMPS. ROC analysis results showed that cut-off values of 5.5 mm for LPS and 6.1 mm for UMPS did not provide improve with medical treatment. At the 6- and 12-month follow-ups, the improvement rates were higher in the UMPS group than in the LPS group (p < 0.05). During the follow-up, recurrence was detected in 43 patients: 29% of patients with LPS and 5.8% of patients with UMPS (p < 0.01). Patients with small stones can be followed up. Surgical treatment may be considered for small stones in the LPS. In addition, the risk of recurrence is higher in patients with LPS, and close follow-up is required.
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Affiliation(s)
- Nimet Öner
- Division of Pediatric Rheumatology, Department of Pediatrics, University of Health Sciences, Ankara Bilkent City Hospital, 06800, Bilkent, Cankaya/Ankara, Turkey.
| | - Funda Baştuğ
- Division of Pediatric Nephrology, Department of Pediatrics, University of Health Sciences, Kayseri City Hospital, Kayseri, Turkey
| | - Büşra Özkan
- Department of Pediatrics, Beylikduzu State Hospital, Istanbul, Turkey
| | - Mustafa Özçatal
- Department of Pediatric Surgery, Adana Seyhan State Hospital, Adana, Turkey
| | - Çiğdem Karakükçü
- Division of Medical Biochemistry, University of Erciyes, Kayseri, Turkey
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Isik G, Bozdag PG. Why is childhood urolithiasis increasing? Etiology, diagnosis and management: a single-center experience. J Nephrol 2023:10.1007/s40620-023-01638-4. [PMID: 37160650 DOI: 10.1007/s40620-023-01638-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Accepted: 04/03/2023] [Indexed: 05/11/2023]
Abstract
BACKGROUND Globally, urolithiasis is becoming more and more common among children. We aimed to determine the etiology, and the diagnostic and therapeutic approaches in patients with urolithiasis. METHODS This was a retrospective study which included all patients (aged 1 month-18 years) admitted to the pediatric nephrology clinic in Elazığ Fethi Sekin City Hospital with urolithiasis between November 2019 and 2021. Only patients whose diagnosis of urolithiasis was confirmed by urinary ultrasonography were included in the study, while patients with chronic diseases (neurological diseases such as epilepsy, cerebral palsy, chronic bowel diseases, etc.) predisposing to kidney stone formation were not. Demographic characteristics, serum and urine biochemical parameters, urine metabolic and kidney stone metabolic and chemical analyses, urinary tract ultrasonography findings and treatment modalities were collected. RESULTS One hundred ninety-seven patients (91 female and 106 male) were included in the study. Hypervitaminosis D was detected in 4 (2%) patients, suppressed parathyroid hormone in 12 (6%) and hypercalcemia in 27 (14%) patients. Metabolic screening showed hypercalciuria in 69 (35%) patients, hypocitraturia in 39 (20%), hyperoxaluria in 15 (8%) and cystinuria in 6 (3%) patients. Eighty three (42%) patients had a positive family history for kidney stones. One hundred eighteen (60%) patients received potassium citrate treatment, 71 (36%) were given hydration and diet recommendations without medical treatment, 6 (3%) received tiopronin treatment, and 2 (1%) patients were treated surgically. CONCLUSIONS Our study suggests that Vitamin D supplementation at doses higher than 400 IU/day may be a risk factor for kidney stones in children. We observed that mothers tend not to give water to infants who are breastfed or formula-fed in the first year of life. K-citrate treatment can be a good option for prevention and dissolution of stones by alkalinization.
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Affiliation(s)
- Gunes Isik
- Pediatric Nephrology, Adiyaman University Faculty of Medicine, Adiyaman, Turkey.
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Travers S, Bertoye C, Daudon M, Courbebaisse M, Baron S. How to Monitor Hydration Status and Urine Dilution in Patients with Nephrolithiasis. Nutrients 2023; 15:nu15071642. [PMID: 37049482 PMCID: PMC10097240 DOI: 10.3390/nu15071642] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2023] [Revised: 03/21/2023] [Accepted: 03/27/2023] [Indexed: 03/30/2023] Open
Abstract
Maintenance of hydration status requires a tight balance between fluid input and output. An increase in water loss or a decrease in fluid intake is responsible for dehydration status, leading to kidney water reabsorption. Thus, urine volume decreases and concentration of the different solutes increases. Urine dilution is the main recommendation to prevent kidney stone recurrence. Monitoring hydration status and urine dilution is key to preventing stone recurrence. This monitoring could either be performed via spot urine or 24 h urine collection with corresponding interpretation criteria. In laboratory conditions, urine osmolality measurement is the best tool to evaluate urine dilution, with less interference than urine-specific gravity measurement. However, this evaluation is only available during time lab examination. To improve urine dilution in nephrolithiasis patients in daily life, such monitoring should also be available at home. Urine color is of poor interest, but reagent strips with urine-specific gravity estimation are currently the only available tool, even with well-known interferences. Finally, at home, fluid intake monitoring could be an alternative to urine dilution monitoring. Eventually, the use of a connected device seems to be the most promising solution.
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Mandal A, Khandelwal P, Geetha TS, Murugan S, Meena J, Jana M, Sinha A, Kumar R, Seth A, Hari P, Bagga A. Metabolic and Genetic Evaluation in Children with Nephrolithiasis. Indian J Pediatr 2022; 89:1243-1250. [PMID: 35819704 DOI: 10.1007/s12098-022-04234-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Accepted: 03/07/2022] [Indexed: 11/25/2022]
Abstract
OBJECTIVE To evaluate metabolic and genetic abnormalities in children with nephrolithiasis attending a referral center in North India. METHODS The patients aged 1-18 y old with nephrolithiasis underwent biochemical evaluation and whole-exome sequencing. The authors evaluated for monogenic variants in 56 genes and compared allele frequency of 39 reported polymorphisms between patients and 1739 controls from the GenomeAsia 100 K database. RESULTS Fifty-four patients, aged 9.1 ± 3.7 y were included. Stones were bilateral in 42.6%, familial in 33.3%, and recurrent in 25.9%. The most common metabolic abnormalities were hypercalciuria (35.2%), hyperoxaluria (24.1%), or both (11.1%), while xanthinuria (n = 3), cystinuria (n = 1), and hyperuricosuria (n = 1) were rare. Exome sequencing identified an etiology in 6 (11.1%) patients with pathogenic/likely pathogenic causative variants. Three variants in MOCOS and one in ATP7B were pathogenic; likely pathogenic variants included MOCOS (n = 2), AGXT, and SLC7A9 (n = 1, each). Causality was not attributed to two SLC34A1 likely pathogenic variants, due to lack of matching phenotype and dominant family history. Compared to controls, allele frequency of the polymorphism TRPV5 rs4252402 was significantly higher in familial stone disease (allele frequency 0.47 versus 0.53; OR 3.2, p = 0.0001). CONCLUSION The chief metabolic abnormalities were hypercalciuria and hyperoxaluria. A monogenic etiology was identified in 11% with pathogenic or likely pathogenic variants using a gene panel for nephrolithiasis. Heterozygous missense variants in the sodium-phosphate cotransporter SLC34A1 were common and required evaluation for attributing pathogenicity. Rare polymorphisms in TRPV5 might increase the risk of familial stones. These findings suggest that a combination of metabolic and genetic evaluation is useful for determining the etiology of nephrolithiasis.
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Affiliation(s)
- Anita Mandal
- Division of Nephrology, Department of Pediatrics, ICMR Center for Advanced Research in Kidney Diseases, All India Institute of Medical Sciences, New Delhi, 110029, India
| | - Priyanka Khandelwal
- Division of Nephrology, Department of Pediatrics, ICMR Center for Advanced Research in Kidney Diseases, All India Institute of Medical Sciences, New Delhi, 110029, India
| | | | | | - Jitendra Meena
- Division of Nephrology, Department of Pediatrics, ICMR Center for Advanced Research in Kidney Diseases, All India Institute of Medical Sciences, New Delhi, 110029, India
| | - Manisha Jana
- Department of Radiodiagnosis, All India Institute of Medical Sciences, New Delhi, India
| | - Aditi Sinha
- Division of Nephrology, Department of Pediatrics, ICMR Center for Advanced Research in Kidney Diseases, All India Institute of Medical Sciences, New Delhi, 110029, India
| | - Rajeev Kumar
- Department of Urology, All India Institute of Medical Sciences, New Delhi, India
| | - Amlesh Seth
- Department of Urology, All India Institute of Medical Sciences, New Delhi, India
| | - Pankaj Hari
- Division of Nephrology, Department of Pediatrics, ICMR Center for Advanced Research in Kidney Diseases, All India Institute of Medical Sciences, New Delhi, 110029, India
| | - Arvind Bagga
- Division of Nephrology, Department of Pediatrics, ICMR Center for Advanced Research in Kidney Diseases, All India Institute of Medical Sciences, New Delhi, 110029, India.
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Ciongradi CI, Filip F, Sârbu I, Iliescu Halițchi CO, Munteanu V, Candussi IL. The Impact of Water and Other Fluids on Pediatric Nephrolithiasis. Nutrients 2022; 14:nu14194161. [PMID: 36235817 PMCID: PMC9573375 DOI: 10.3390/nu14194161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 10/02/2022] [Accepted: 10/04/2022] [Indexed: 11/05/2022] Open
Abstract
Pediatric nephrolithiasis cases have been on the rise in the past several years, resulting in increased healthcare costs and other burdens on the juveniles with this ailment. Recent research has shown that present trends in pediatric nephrolithiasis have changed as a result of fluid intake, including water consumption, nutrition, obesity prevalence, lifestyle, and imaging procedures. A specific cause, meanwhile, is still elusive. Trends in pediatric nephrolithiasis need to be thoroughly researched. Furthermore, variables specific to pediatric nephrolithiasis that could cause greater difficulties in an affected child elevate the level of worry with cumulative prevalence. Doctors should rigorously assess patients who present with kidney stones when they have dynamics such as varied clinical presentation, high recurrence of kidney stones linked to metabolic and urinary tract problems, and the potential existence of rare genetic kidney stone illnesses. This review aims to identify adaptive risk factors and anomalies that call for specialized treatment and prescription. More specifically, the major goals of medical and surgical treatments are to eliminate kidney stone risk and stop relapse while concurrently lowering interventional barriers. A dedicated nephrolithiasis clinic run by a pediatric nephrologist, nutritionist, urologist, and clinical nurse may sometimes be beneficial for patients in serious danger. Such a clinic offers significant chances to learn more about pediatric nephrolithiasis, which has been linked to water consumption and hence fosters urgently required study in this area.
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Affiliation(s)
- Carmen Iulia Ciongradi
- 2nd Department of Surgery—Pediatric Surgery and Orthopedics, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iași, Romania
| | - Florin Filip
- Pediatric Surgery and Orthopedics Department, County Hospital, “Ștefan cel Mare” University, 720229 Suceava, Romania
| | - Ioan Sârbu
- 2nd Department of Surgery—Pediatric Surgery and Orthopedics, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iași, Romania
- Correspondence: (I.S.); (V.M.)
| | | | - Valentin Munteanu
- Department of Biomedical Sciences, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iași, Romania
- Correspondence: (I.S.); (V.M.)
| | - Iuliana-Laura Candussi
- Clinical Surgery Department, Faculty of Medicine and Pharmacy, “Dunărea de Jos” University, 800008 Galați, Romania
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Mu XN, Guo LF, Wang PX, Zhang LY, Wang SJ. Semirigid Ureteroscopy Therapy against Childhood Kidney Stones. Appl Bionics Biomech 2022; 2022:7771920. [PMID: 35979239 PMCID: PMC9377984 DOI: 10.1155/2022/7771920] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Accepted: 07/22/2022] [Indexed: 12/03/2022] Open
Abstract
Objective The purpose of the current study was to assess the effectiveness of semirigid ureterorenoscopy (URS) as first-line therapy for early childhood patients with <20 mm stones in the pelvic, middle, or upper calices. Methods In all, 61 pediatric kidney stone patients who had flexible ureteroscopy (fURS) between January 1, 2010, and December 31, 2019, were included in this study. Before fURS, semirigid URS employed the UreTron or holmium: YAG (Ho : YAG) laser was conducted. When semirigid URS was unsuccessful, fURS was used for retrograde intrarenal surgery (RIRS). All participants were monitored clinically for a minimum of three months after each procedure. Results The patient's mean age was 4.52 ± 1.53 years, and 52 (83.61%) participants underwent semirigid URS successfully. Mean procedural duration of semirigid URS was 36.49 ± 7.72 min. The stone-free rate after semirigid URS was 92.16% (47/51). During the postprocedural medical observation, there were no serious adverse effects. Conclusions Based on the present study's findings, semirigid URS is a low-risk, effective therapy for kidney stones in selected pediatric patients.
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Affiliation(s)
- Xiao-Nan Mu
- Cadres Integrative Unit 2, Central Hospital Affiliated to Shandong First Medical University, Jinan, 250013 Shandong, China
| | - Long-Fei Guo
- Department of Urology, Central Hospital Affiliated to Shandong First Medical University, Jinan, 250013 Shandong, China
| | - Peng-Xin Wang
- College of Basic Medicine, Jining Medical University, Jining, 272067 Shandong, China
| | - Long-Yang Zhang
- Department of Urology, Central Hospital Affiliated to Shandong First Medical University, Jinan, 250013 Shandong, China
| | - Si-Jun Wang
- Department of Urology, Central Hospital Affiliated to Shandong First Medical University, Jinan, 250013 Shandong, China
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Penido MGMG, Tavares MDS. Beyond kidney stones: Why pediatricians should worry about hypercalciuria. World J Clin Pediatr 2021; 10:137-150. [PMID: 34868890 PMCID: PMC8603641 DOI: 10.5409/wjcp.v10.i6.137] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Revised: 08/08/2021] [Accepted: 10/31/2021] [Indexed: 02/06/2023] Open
Abstract
The incidence of urolithiasis (UL) is increasing, and it has become more common in children and adolescents over the past few decades. Hypercalciuria is the leading metabolic risk factor of pediatric UL, and it has high morbidity, with or without lithiasis as hematuria and impairment of bone mass. The reduction in bone mineral density has already been described in pediatric idiopathic hypercalciuria (IH), and the precise mechanisms of bone loss or failure to achieve adequate bone mass gain remain unknown. A current understanding is that hypercalciuria throughout life can be considered a risk of change in bone structure and low bone mass throughout life. However, it is still not entirely known whether hypercalciuria throughout life can compromise the quality of the mass. The peak bone mass is achieved by late adolescence, peaking at the end of the second decade of life. This accumulation should occur without interference in order to achieve the peak of optimal bone mass. The bone mass acquired during childhood and adolescence is a major determinant of adult bone health, and its accumulation should occur without interference. This raises the critical question of whether adult osteoporosis and the risk of fractures are initiated during childhood. Pediatricians should be aware of this pediatric problem and investigate their patients. They should have the knowledge and ability to diagnose and initially manage patients with IH, with or without UL.
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Affiliation(s)
- Maria Goretti Moreira Guimarães Penido
- Pediatric Nephrology Unit, Nephrology Center, Santa Casa de Belo Horizonte Hospital, CEP 30150320, Belo Horizonte, Minas Gerais, Brazil
- Pediatric Nephrology Unit, Pediatric Department, Clinics Hospital, Universidade Federal de Minas Gerais, CEP 30130100, Belo Horizonte, Minas Gerais, Brazil
| | - Marcelo de Sousa Tavares
- Pediatric Nephrology Unit, Nephrology Center, Santa Casa de Belo Horizonte Hospital, CEP 30150320, Belo Horizonte, Minas Gerais, Brazil
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Zhong J, Huang Z, Yang T, Wang G, Guo H, Li P, Zhang Y, Zhao Y, Liu J. The current status of preventive measures for urinary calculi in children. Ther Adv Urol 2021; 13:17562872211039581. [PMID: 34422114 PMCID: PMC8371722 DOI: 10.1177/17562872211039581] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Accepted: 07/27/2021] [Indexed: 11/17/2022] Open
Abstract
Urological calculus is a common disease in urology. Urological calculi are
generally more common in adults but have become more common in children in
recent years. Most existing studies focus on the prevention of urinary calculi
in adults; there are relatively few articles on calculi in children. Reported
preventive measures are not comprehensive enough, while the latest research
progress has not been updated. The pathogenesis and preventive measures
associated with urinary calculi have been the focus of research, but many
preventive measures still need further clarification. This article reviews the
progress on preventive measures for urinary calculi in children.
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Affiliation(s)
- Jiao Zhong
- The Department of Urology, The Second Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, P.R. China
| | - Ziye Huang
- The Department of Urology, The Second Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, P.R. China
| | - Tongxin Yang
- The Department of Urology, The Second Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, P.R. China
| | - Guang Wang
- The Department of Urology, The Second Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, P.R. China
| | - Haixiang Guo
- The Department of Urology, The Second Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, P.R. China
| | - Pei Li
- The Department of Urology, The Second Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, P.R. China
| | - Yafei Zhang
- The Department of Urology, The Second Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, P.R. China
| | - Yuan Zhao
- The Department of Urology, The Second Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, P.R. China
| | - Jianhe Liu
- The Department of Urology, The Second Affiliated Hospital of Kunming Medical University, No. 374 Dian-Mian Avenue, Kunming, Yunnan 650101, P.R. China
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Okura H, Yodoshi T, Thapaliya S, Trout AT, Mouzaki M. Under-reporting of Hepatic Steatosis in Children: A Missed Opportunity for Early Detection. J Pediatr 2021; 234:92-98.e2. [PMID: 33745998 DOI: 10.1016/j.jpeds.2021.03.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 02/15/2021] [Accepted: 03/11/2021] [Indexed: 12/11/2022]
Abstract
OBJECTIVE To determine the prevalence of underreporting of hepatic steatosis found incidentally on computed tomography (CT). STUDY DESIGN Retrospective cross-sectional study including patients <18 years of age who had undergone unenhanced abdominal CT for evaluation of nephrolithiasis. Hepatic and splenic attenuation were measured independently by 2 reviewers. Hepatic steatosis was defined using various previously established criteria (4 original criteria designed to detect moderate/severe steatosis and 3 secondary criteria designed to identify mild steatosis). Radiology reports and clinical notes were reviewed for documentation of steatosis. Serum alanine aminotransferase levels were collected. Kappa statistics were used to assess agreement between reviewers. RESULTS A total of 584 patients were included. Agreement between reviewers' measurements for categorical classification of presence of steatosis was excellent (kappa statistic agreement >87%). The prevalence of hepatic steatosis ranged from 3% to 35%, depending on the criterion. Using absolute liver attenuation <48 Hounsfield units (most likely reflective of the truth, given alanine aminotransferase distribution and body mass index data), the prevalence was 7% (n = 42). Steatosis was reported for only 12 of 42 (28%) of these patients and was documented in clinical notes in only 3 of those cases. CONCLUSIONS Hepatic steatosis is underreported as an incidental finding of CT for nephrolithiasis. Given the prevalence and silent nature of nonalcoholic fatty liver disease, a high level of suspicion is needed, so as not to miss the opportunity to identify steatosis in childhood.
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Affiliation(s)
- Hiroko Okura
- Division of Pediatric Gastroenterology, Hepatology, and Nutrition, Cincinnati Children's Hospital Medical Center, Cincinnati, OH; Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH
| | - Toshifumi Yodoshi
- Division of Pediatric Gastroenterology, Hepatology, and Nutrition, Cincinnati Children's Hospital Medical Center, Cincinnati, OH; Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH
| | - Samjhana Thapaliya
- Department of Radiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH
| | - Andrew T Trout
- Department of Radiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH; Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH
| | - Marialena Mouzaki
- Division of Pediatric Gastroenterology, Hepatology, and Nutrition, Cincinnati Children's Hospital Medical Center, Cincinnati, OH; Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH.
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12
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Çakici MÇ, Keser F, Atis RG, Yildirim A. Mini-percutaneous nephrolithotomy in a child with multiple urogenital anomalies and a solitary duplex kidney. Int Braz J Urol 2021; 47:464-467. [PMID: 33284555 PMCID: PMC7857776 DOI: 10.1590/s1677-5538.ibju.2019.0545] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2019] [Accepted: 06/07/2020] [Indexed: 11/29/2022] Open
Abstract
Purpose: To report a case of successful removal of right staghorn renal calculi in a 3-year-old girl with Arnold-Chiari malformation and multiple urogenital anomalies. Case report: A 3-year-old female child with the diagnosis of Arnold-Chiari type 2 malformation was referred to our clinic due to presence of 9 kidney stones with a total volume of 10743mm3. The total of the longest diameters of all stones was calculated as 11.4cm. The patient had a urogenital septum, bifid bladder, and duplicated collecting system on the right side. An 18F Amplatz sheath was placed and mini-percutaneous nephrolithotomy was performed successfully by laser and pneumatic lithotripter. Any residual urinary tract stones or urinary tract infection were not detected during the 6th-month follow-up. Conclusion: Urolithiasis requires a thorough understanding of the underlying causes, as well as an effective and minimally invasive treatment. It is important for urologists to understand the complexity of the optimal stone management in pediatric patients in order to maximize treatment efficacy and minimize morbidity. We conclude that it is essential to treat urolithiasis in a single session in children with urogenital anomalies and accompanying congenital anomalies who have past surgical history.
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Affiliation(s)
- Mehmet Çaglar Çakici
- Department of Urology, Istanbul Medeniyet University Goztepe Training and Research Hospital, Istanbul, Turkey
| | - Ferhat Keser
- Department of Urology, Istanbul Medeniyet University Goztepe Training and Research Hospital, Istanbul, Turkey
| | - Ramazan Gokhan Atis
- Department of Urology, Istanbul Medeniyet University Goztepe Training and Research Hospital, Istanbul, Turkey
| | - Asif Yildirim
- Department of Urology, Istanbul Medeniyet University Goztepe Training and Research Hospital, Istanbul, Turkey
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Metabolic risk factors in children with kidney stone disease: an update. Pediatr Nephrol 2020; 35:2107-2112. [PMID: 32564280 DOI: 10.1007/s00467-020-04660-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 06/02/2020] [Accepted: 06/09/2020] [Indexed: 10/24/2022]
Abstract
BACKGROUND The prevalence of kidney stones in children has significantly increased in the past few decades, with concomitant increased morbidity and healthcare costs worldwide. Assessing metabolic risk factors is essential for diagnosis and specific treatment. The objective of this retrospective study is to identify the epidemiological and clinical characteristics of children under 17 years of age, as well as the metabolic risk factors of nephrolithiasis. METHODS A total of 300 children with kidney stone disease were included to undergo several clinical tests using a standardized protocol. RESULTS The mean age was 11.2 years, and the male:female ratio was 1.15:1.0. Biochemical abnormalities were found in 89.3% of all cases. A single urine metabolic risk factor was present in 52.6% (n = 141) of the patients, and multiple risk factors were present in 36.7% (n = 106). Idiopathic hypercalciuria (alone or in combination) and hypocitraturia (alone or in combination) were the most frequent risk factors identified in 47.0% and 39.6% of these patients, respectively. Renal colic and/or unspecified abdominal pain were the most frequent forms of presentation (76.9%), followed by hematuria in 64.4% with 97.5% of stones located in the upper urinary tract. A positive family history in first-degree and second-degree relatives was found in 64.8% of boys and 61.8% of girls. CONCLUSIONS We conclude that specific urinary metabolic risk factors can be found in most children with kidney stones, with hypercalciuria and hypocitraturia being the most common diagnoses. Graphical abstract .
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Abstract
Pediatric nephrolithiasis is a disease of increasing prevalence and economic burden, with data showing a rising trend among girls and adolescents. Kidney stones in children tend to have a high recurrence rate related to underlying risk factors, and the aim of evaluation should be to understand such causes so that targeted therapy can be provided to decrease recurrence and complications. Metabolic, anatomic, and genetic abnormalities as well as environmental risk factors have all been implicated in the pathogenesis of nephrolithiasis. Recent studies have focused on identifying monogenic causes of nephrolithiasis and/or nephrocalcinosis in young patients that would result in personalization of treatment as well as future diagnostic implications for family members. Treatment aims to decrease stone burden and recurrence as well as minimize complications and is guided by stone size and location as well as surgical expertise. Multidisciplinary care for these patients has been on the rise to provide a more comprehensive medical and surgical support. [Pediatr Ann. 2020;49(6):e262-e267.].
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Robinson C, Shenoy M, Hennayake S. No stone unturned: The epidemiology and outcomes of paediatric urolithiasis in Manchester, United Kingdom. J Pediatr Urol 2020; 16:372.e1-372.e7. [PMID: 32249190 DOI: 10.1016/j.jpurol.2020.03.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Accepted: 03/12/2020] [Indexed: 01/22/2023]
Abstract
BACKGROUND The epidemiology and risk factors for paediatric urolithiasis (UL) in developed countries are evolving, with increasing rates of metabolic stone-formers. In the United Kingdom (UK), only a single London cohort has been studied in the past three decades. Regional disease patterns across the UK remain unknown. UL has been associated with an increased risk of chronic kidney disease in adults, but long-term paediatric outcomes remain poorly understood. METHODS We assessed the epidemiology of paediatric UL by defining the demographics, incidence, aetiology, recurrence rates and outcomes at tertiary nephro-urology centres in Greater Manchester. Health records of 177 consecutive paediatric urology referrals (0-18 years) for UL between 2002 and 2015 were retrospectively included for observational analysis. Metabolic screening was performed in 105 children. RESULTS The incidence of paediatric urology referrals for UL was 1.77/100,000 person-years, increasing annually by 13.6%. Mean patient age was 8.2 years and the male:female ratio was 1.3:1. The upper urinary tract was involved in more than 90% of cases and 45% of children presented with multiple calculi. Metabolic abnormalities were identified in 52% of children screened: hypercalciuria (64%), hyperoxaluria (18%) and cystinuria (11%) were the most common. Significant family history was predictive of metabolic abnormalities (OR 4.9:1, 95% CI 1.4-17.0). 30% of children had infective stones, which were more common in children less than 6 years. Ultrasound was found to be 90% sensitive for UL detection. Dimercaptosuccinic acid (DMSA) imaging identified renal scarring in 33 of the 55 children tested (60%). Recurrence was observed in 18% of children over mean 6.4 year follow-up and was more common in metabolic stone-formers. Spontaneous passage was observed in 83% of stones ≤ 5 mm, 69% between 5 and 10 mm and only one calculi > 10 mm. CONCLUSIONS The incidence of paediatric urology referrals for UL is rising in North West England. Metabolic abnormalities were detected in half of the children tested, justifying comprehensive screening. Recurrence is common following paediatric UL, reinforcing the need for stone prevention strategies. The majority of calculi less than 10 mm were found to pass spontaneously with supportive measures, which favours an initial observation period over surgical intervention for small calculi. UL was associated with renal scarring in the analysed population and therefore, children with UL require long-term assessment of blood pressure and proteinuria.
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Affiliation(s)
- Cal Robinson
- Royal Manchester Children's Hospital, Manchester, UK; University of Manchester, Medical School, Manchester, UK; Department of Pediatrics, McMaster University, Hamilton ON, Canada.
| | - Mohan Shenoy
- Royal Manchester Children's Hospital, Manchester, UK
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Association between dietary pattern and metabolic disorders in children and adolescents with urolithiasis. JORNAL DE PEDIATRIA (VERSÃO EM PORTUGUÊS) 2020. [DOI: 10.1016/j.jpedp.2018.11.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Vieira MS, Francisco PDC, Hallal ALLC, Penido MGMG, Bresolin NL. Association between dietary pattern and metabolic disorders in children and adolescents with urolithiasis. J Pediatr (Rio J) 2020; 96:333-340. [PMID: 30731051 PMCID: PMC9432078 DOI: 10.1016/j.jped.2018.11.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 10/17/2018] [Accepted: 11/19/2018] [Indexed: 01/17/2023] Open
Abstract
OBJECTIVE To describe the dietary patterns and occurrence of metabolic disorders in children and adolescents with urolithiasis treatment at a referral hospital in southern Brazil in order to learn the features of urolithiasis in this population to better develop preventive actions. METHODS Descriptive study conducted between 2016 and 2017 in a tertiary care referral hospital. Fourty patients aged 2-19 years old with urolithiasis proven by imaging were included. Clinical and dietary data were obtained through interviews and medical records. For statistical analyses, the chi-squared test was performed. RESULTS 40 individuals were analyzed. Mean age at diagnosis was 7.2±4 years. 25% were overweight or obese. 95% had metabolic disorders, hypocitraturia being the predominant type. Protein intake was adequate in all participants and carbohydrate intake, in 70% of them; 37.5% had lipid intake above recommended and 65% had low fiber intake. The mean daily sodium intake was 2.64g (±1.74), with 55% of participants ingesting more than the recommended amount. A total of 52.5% had low potassium intake, with a mean of 4.79g/day (±2.49). Calcium intake was adequate in 27.5%. No significant differences were identified in relation to mean daily consumption among participants with or without the various metabolic disorders. CONCLUSION Pediatric urolithiasis is often accompanied by metabolic disorders; therefore, metabolic evaluation should be part of the diagnostic process and subsequent analysis of these patients' dietary patterns, helping to optimize treatment and prevent recurrences and complications.
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Affiliation(s)
- Mariana S Vieira
- Universidade Federal de Santa Catarina (UFSC), Centro de Ciências da Saúde, Departamento de Pediatria, Florianópolis, SC, Brazil
| | - Priscila de C Francisco
- Universidade Federal de Santa Catarina (UFSC), Centro de Ciências da Saúde, Departamento de Pediatria, Florianópolis, SC, Brazil; Universidade Federal do Paraná (UFPR), Curitiba, PR, Brazil
| | - Ana Luiza L C Hallal
- Universidade de São Paulo (USP), São Paulo, SP, Brazil; Universidade Federal de Santa Catarina (UFSC), Centro de Ciências da Saúde, Departamento de Saúde Pública, Florianópolis, SC, Brazil
| | - Maria Goretti M G Penido
- University of Missouri, School of Medicine, The Childrens Mercy Hospitals and Clinics, Bone and Mineral Disorders Clinic and Research Laboratory, Section of Pediatric Nephrology, Kansas, United States; Santa Casa de Belo Horizonte, Serviço de Nefrologia, Unidade de Nefrologia Pediátrica, Belo Horizonte, MG, Brazil; Universidade Federal de Minas Gerais (UFMG), Faculdade de Medicina, Departamento de Pediatria, Belo Horizonte, MG, Brazil
| | - Nilzete L Bresolin
- Universidade Federal de Santa Catarina (UFSC), Centro de Ciências da Saúde, Departamento de Pediatria, Florianópolis, SC, Brazil; Universidade Federal de Santa Catarina (UFSC), Florianópolis, SC, Brazil; Hospital Infantil Joana de Gusmão, Unidades de Nefrologia Pediátrica e de Terapia Intensiva, Florianópolis, SC, Brazil Received 31 August 2018; accepted 31 October 2018.
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Abstract
PURPOSE OF REVIEW As the incidence of urinary stone disease in children is increasing, identifying dietary risk factors becomes vitally important, especially in the context of targeting interventions to reduce risk for stone formation. Indiscriminant dietary restrictions are not appropriate for paediatric patients. RECENT FINDINGS Although large, prospective studies are still needed to better quantify dietary risk factors for paediatric stone formers, a number of smaller studies provide data to identify common risk factors to help prevent stone formation, while minimizing inappropriate dietary restrictions. SUMMARY Interpretation of 24-h urine samples to identify individualized dietary risk factors is crucial for implementing a strategy for prevention of further urinary stone formation in children. Clinicians should avoid generalized dietary restrictions in stone-forming children uninformed by laboratory data.
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Mai Z, Liu Y, Wu W, Aierken A, Jiang C, Batur J, Wusiman S, Ma J, Li Y, Xu H, Ainiwa A, Saimaiti S, Tuerxun A, Zeng G. Prevalence of urolithiasis among the Uyghur children of China: a population-based cross-sectional study. BJU Int 2019; 124:395-400. [PMID: 30993821 DOI: 10.1111/bju.14776] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
OBJECTIVES To investigate the prevalence and associated factors of urolithiasis amongst Uyghur children. SUBJECTS AND METHODS A cross-sectional survey was conducted of Uyghur children (aged ≤14 years) in the Kashgar Region of China, from July to December 2016. Children were selected by a two-stage random clustered sampling method, evaluated by urinary tract ultrasonography, low-dose computed tomography (CT) examination, blood and urine analysis, and a questionnaire. The prevalence by CT, the prevalence by self-report in the questionnaires, and the lifetime prevalence were evaluated. Binary logistic regression was used to estimate the associated factors. RESULTS A total of 5605 children were selected and invited to participate in the study. In all, 4813 Uyghur children (2471 boys and 2342 girls), with an mean (SD; range) age of 75.79 (43.81; 2-177) months, were included in the final analysis, with a response rate of 85.9%. The prevalence of paediatric urolithiasis was 1.8% (95% confidence interval [CI] 1.5-2.2) by CT, 2.3% (95% CI 1.9-2.7) by self-report, and 3.6% (95% CI 3.0-4.1) for the overall life-time. The age-sex adjusted prevalence was 2.0% (95% CI 1.6-2.4) by CT. Binary logistic regression analysis showed that body mass index, urinary tract infection, a family history of urolithiasis, and excessive sweating could increase the risk of stone formation, whilst breast feeding and drinking water at midnight could decrease the risk. CONCLUSIONS Urolithiasis is a major public health problem amongst Uyghur children, and strategies aimed at the prevention of urolithiasis are needed.
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Affiliation(s)
- Zanlin Mai
- Department of Urology, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,Guangdong Key Laboratory of Urology, Guangzhou, China
| | - Yongda Liu
- Department of Urology, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,Guangdong Key Laboratory of Urology, Guangzhou, China
| | - Wenqi Wu
- Department of Urology, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,Guangdong Key Laboratory of Urology, Guangzhou, China
| | - Ainiwaer Aierken
- Department of Urology, the First People's Hospital of Kashgar Region, Kashgar, Xinjiang, China
| | - Chonghe Jiang
- Department of Urology, the Sixth Affiliated Hospital of Guangzhou Medical University, Qingyuan, China
| | - Jesur Batur
- Department of Urology, the First People's Hospital of Kashgar Region, Kashgar, Xinjiang, China
| | - Sulitan Wusiman
- Department of Urology, the First People's Hospital of Kashgar Region, Kashgar, Xinjiang, China
| | - Jinxiang Ma
- Departments of Epidemiology and Biostatistics, School of Public Health, Guangzhou Medical University, Guangzhou, China
| | - Yusi Li
- Departments of Epidemiology and Biostatistics, School of Public Health, Guangzhou Medical University, Guangzhou, China
| | - Hai Xu
- Department of Urology, the First People's Hospital of Kashgar Region, Kashgar, Xinjiang, China
| | - Aikebaier Ainiwa
- Department of Urology, the First People's Hospital of Kashgar Region, Kashgar, Xinjiang, China
| | - Saiding Saimaiti
- Department of Urology, the First People's Hospital of Kashgar Region, Kashgar, Xinjiang, China
| | - Aierken Tuerxun
- Department of Urology, the First People's Hospital of Kashgar Region, Kashgar, Xinjiang, China
| | - Guohua Zeng
- Department of Urology, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,Guangdong Key Laboratory of Urology, Guangzhou, China
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Schwaderer AL, Raina R, Khare A, Safadi F, Moe SM, Kusumi K. Comparison of Risk Factors for Pediatric Kidney Stone Formation: The Effects of Sex. Front Pediatr 2019; 7:32. [PMID: 30809514 PMCID: PMC6379338 DOI: 10.3389/fped.2019.00032] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Accepted: 01/24/2019] [Indexed: 11/13/2022] Open
Abstract
Background: Urinary stones are affecting more children, and pediatric stone formers have unique pathophysiology compared to adults. While adult stone formers are most frequently male, children have an age dependent sex prevalence. Under 10 years, a majority of stone formers are boys; adolescent stone formers are mostly female. Previous adult studies have shown that stone composition is influenced by the sex and age of the stone former. Thus, we hypothesize that female and male stone forming children will also have sex and age specific stone phenotypes. Methods: Retrospective chart review of a large pediatric center's stone forming children 6/1/2009 to 6/1/2016. Patients were identified by ICD 9 codes: N20, N20.1, and N20.9. Charts were reviewed for radiographic evidence of stones or documented visualized stone passage. Results: One hundred and thirty six subjects: 54 males and 82 females. Females were older, median age 14 years [interquartile range (IQR): 11, 15] vs. males' median age 12 years (IQR: 11, 14) (p < 0.01). Females had lower height z-scores, median 0.2 (IQR: -0.8, 0.8) vs. males' median 0.8 (IQR: -0.2, 1.8) (p < 0.01). Presenting symptoms were similar except flank pain affecting 39% of females vs. 22% of males (p = 0.04). Leukocyte esterase was positive in more females than males (33 vs. 4%) (p < 0.001). Males had a higher BUN/Cr ratio, mean ± standard deviation of 19.8 ± 6.3 vs. 16.6 ± 6.5 in females (p = 0.01). Glomerular hyperfiltration was present in 9% of patients while 35% of patients had estimated glomerular filtration rate (eGFR) < 90 ml/min/1.73 m2. Treatment strategies and clinical course were similar except females were told to increase dietary citrate more frequently than males (21 vs. 4%) (p < 0.01). Conclusion: We have provided a novel analysis and demonstrated that low height z-score and pyuria are more common in female stone formers. We have also shown that 9% of pediatric stone formers have labs consistent with hyperfiltration. Whether high protein intake and/or chronic dehydration are associated with hyperfiltration and long-term renal function in children with kidney stones will be an area for future research.
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Affiliation(s)
- Andrew L Schwaderer
- Division of Nephrology, Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Rupesh Raina
- Division of Nephrology, Akron Children's Hospital, Akron, OH, United States
| | - Anshika Khare
- Northeast Ohio Medical University, Rootstown, OH, United States
| | - Fayez Safadi
- Northeast Ohio Medical University, Rootstown, OH, United States
| | - Sharon M Moe
- Division of Nephrology, Department of Medicine, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Kirsten Kusumi
- Division of Nephrology, Akron Children's Hospital, Akron, OH, United States.,Northeast Ohio Medical University, Rootstown, OH, United States
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Barata CB, Valete COS. CLINICAL-EPIDEMIOLOGICAL PROFILE OF 106 PEDIATRIC PACIENTS WITH UROLITHIASIS IN RIO DE JANEIRO, BRAZIL. REVISTA PAULISTA DE PEDIATRIA 2018; 36:261-267. [PMID: 30365808 PMCID: PMC6202900 DOI: 10.1590/1984-0462/;2018;36;3;00009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Accepted: 08/23/2017] [Indexed: 01/20/2023]
Abstract
Objective: To describe the frequency, clinical profile and treatment of patients with
urolithiasis in the Pediatric Nephrology Department of a public state
hospital in Rio de Janeiro, Brazil. Methods: Retrospective study. Data from pediatric patients (age: 1 month - 18 years)
with urolithiasis admitted between January/2012 and December/2014 were
reviewed from hospital charts. The studied variables were: demographic and
anthropometric data, clinical status, family history of urolithiasis,
urinary tract infection and use of lithogenic drugs, diagnostic procedures,
associated abnormalities, metabolic disorders, treatment and recurrence. Results: The frequency of urolithiasis was 13.6%. Main characteristics of the
patients: male gender, white race, eutrophy, aged between 5 and 10 years,
family history of urolithiasis, previous urinary infection and spontaneous
stone passage. Abdominal and flank pain and macroscopic hematuria were the
most common complaints. The most frequent metabolic disorders were
hypercalciuria, hyperuricosuria and hypocitraturia. Hypocitraturia was
associated with previous urinary infection (p=0.004). Abdomen/urinary tract
ultrasonography was the most commonly used diagnostic test. Hydronephrosis
occurred in 54.4% of the cases, 81.1% of the stones were in the kidneys, and
bilateral stones were associated to a family history of urolithiasis
(p=0.030). Recurrence rate was 29.3% (most patients had a metabolic
disorder). In 12.3%, the patients underwent lithotripsy, 24.5% were
surgically treated (mainly pyelolithotomy), and only 7.6% had their stones
analyzed (calcium oxalate was the main finding in the examined stones). Conclusions: The frequency of urolithiasis in these pediatric patients was similar to
that reported by the literature. A metabolic evaluation is required and the
composition of stones should be better evaluated.
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Chan KH, Moser EA, Whittam BM, Misseri R, Cain MP, Krambeck A. The ability of a limited metabolic assessment to identify pediatric stone formers with metabolic abnormalities. J Pediatr Urol 2018; 14:331.e1-331.e6. [PMID: 30177386 DOI: 10.1016/j.jpurol.2018.08.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Accepted: 08/01/2018] [Indexed: 12/11/2022]
Abstract
INTRODUCTION American Urological Association guidelines recommend a urinary metabolic evaluation after the first stone event in all pediatric stone patients. Prior studies identified hypercalciuria and urine hypovolemia as the most common abnormalities in children with urolithiasis. Recent data suggest that hypocitraturia is most prevalent. It was hypothesized that a limited evaluation would detect the majority of clinically significant metabolic abnormalities in pediatric stone formers. MATERIAL AND METHODS A retrospective analysis of all children (<18 years of age) with renal/ureteral calculi evaluated at the study institution from 2005 to 2015 was performed. Children with ≥ one 24-h urinary metabolic profile after a clinical visit for renal/ureteral calculi were included. Those with bladder stones and those with undercollection or overcollection or missing urinary creatinine were excluded. Demographics and data from the first urinary metabolic profile and stone analyses were collected. The sensitivity, specificity, and positive and negative predictive value (NPV) of a limited urinary metabolic evaluation consisting of four parameters (24-h calcium, citrate, and oxalate and low urinary volume) were compared to a complete urinary metabolic profile. The number and type of metabolic abnormalities that would have been missed with this limited evaluation weredetermined. RESULTS Of 410 patients, 21 were excluded for age ≥18 years, 13 for bladder stones, 248 for overcollections, 38 for undercollections, and 10 for missing creatinine. This left 80 patients for inclusion: median age 11.4 years, 60% female, and 96.3% white. Of the entire cohort, 69.6% had hypocitraturia, 52.5% had low urine volume, and 22.5% had hypercalciuria. Sensitivity was 87.5%. Specificity could not be calculated because no patients had a normal complete metabolic evaluation. The NPV was zero, and the positive predictive value was 100%, but these are artifacts resulting from the absence of patients with a normal complete metabolic evaluation. Of the 80 patients, 10 had at least one abnormality missed by a limited metabolic evaluation (Table 1). The missed abnormalities were high pH (n = 6), abnormal 24-h phosphorus (low in 1 patient and high in 1 patient), low 24-h magnesium (n = 3), low 24-h potassium (n = 3), and high 24-h sodium (n = 4). DISCUSSION A limited urinary metabolic evaluation would have detected the vast majority of clinically significant metabolic abnormalities in the study sample. Approximately two-thirds of the study patients submitted inadequate 24-h urine specimens. CONCLUSIONS A simplified approach to metabolic evaluation in first-time stone formers with a stone analysis available was proposed. This streamlined approach could simplify the metabolic evaluation and reduce health care costs.
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Affiliation(s)
- K H Chan
- Department of Urology, 535 Barnhill Dr. Indianapolis, IN, 46202, USA; Center for Pediatric and Adolescent Comparative Effectiveness Research and Department of Biostatistics, 410 W. 10th St. Suite 2000, Indianapolis, IN 46202, USA.
| | - E A Moser
- Department of Biostatistics, Indiana University School of Medicine and Richard M. Fairbanks School of Public Health, Indianapolis, IN, USA
| | - B M Whittam
- Department of Urology, 535 Barnhill Dr. Indianapolis, IN, 46202, USA
| | - R Misseri
- Department of Urology, 535 Barnhill Dr. Indianapolis, IN, 46202, USA
| | - M P Cain
- Department of Urology, 535 Barnhill Dr. Indianapolis, IN, 46202, USA
| | - A Krambeck
- Department of Urology, 535 Barnhill Dr. Indianapolis, IN, 46202, USA
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Edvardsson VO, Ingvarsdottir SE, Palsson R, Indridason OS. Incidence of kidney stone disease in Icelandic children and adolescents from 1985 to 2013: results of a nationwide study. Pediatr Nephrol 2018; 33:1375-1384. [PMID: 29626242 DOI: 10.1007/s00467-018-3947-x] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/27/2017] [Revised: 03/19/2018] [Accepted: 03/20/2018] [Indexed: 11/26/2022]
Abstract
BACKGROUND An increase in the incidence of kidney stone disease has been reported for all age groups worldwide. To examine this trend, we conducted a nationwide study of the epidemiology of kidney stones in Icelandic children and adolescents over a 30-year period. METHODS Computerized databases of all major hospitals and medical imaging centers in Iceland were searched for International Classification of Diseases and radiologic and surgical procedure codes indicative of kidney stones in patients aged < 18 years, followed by a thorough medical record review. Age-adjusted incidence was calculated for the time intervals 1985-1989, 1990-1994, 1995-1999, 2000-2004, 2005-2009, and 2010-2013. Time trends in stone incidence were assessed by Poisson regression. The prevalence of stone disease for the years 1999-2013 was also determined. RESULTS Almost all the 190 patients (97%) that we identified had symptomatic stones, and acute flank or abdominal pain and hematuria were the most common presenting features. The total annual incidence of kidney stones increased from 3.7/100,000 in the first 5-year interval to 11.0/100,000 during the years 1995-2004 (p < 0.001) and decreased thereafter to 8.7/100,000 in 2010-2013 (p = 0.63). The incidence rise was highest in girls aged 13-17 years, in whom it rose from 9.8/100,000 in 1985-1989 to 39.2/100,000 in 2010-2013 (p < 0.001), resulting in an overall female predominance in this age group. The mean annual prevalence of stone disease in 1999-2013 was 48/100,000 for boys and 52/100,000 for girls. CONCLUSION We found a significant increase in the incidence of childhood kidney stone disease, driven by a dramatic increase of stone frequency in teenage females which is poorly understood and warrants further study.
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Affiliation(s)
- Vidar O Edvardsson
- Faculty of Medicine, School of Health Sciences, University of Iceland, Reykjavik, Iceland.
- Children's Medical Center, Landspitali-The National University Hospital of Iceland, 101, Reykjavik, Iceland.
| | - Solborg E Ingvarsdottir
- Faculty of Medicine, School of Health Sciences, University of Iceland, Reykjavik, Iceland
- Children's Medical Center, Landspitali-The National University Hospital of Iceland, 101, Reykjavik, Iceland
| | - Runolfur Palsson
- Faculty of Medicine, School of Health Sciences, University of Iceland, Reykjavik, Iceland
- Division of Nephrology, Internal Medicine Services, Landspitali-The National University Hospital of Iceland, Reykjavik, Iceland
| | - Olafur S Indridason
- Division of Nephrology, Internal Medicine Services, Landspitali-The National University Hospital of Iceland, Reykjavik, Iceland
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Role of FGF23 in Pediatric Hypercalciuria. BIOMED RESEARCH INTERNATIONAL 2018; 2017:3781525. [PMID: 29457024 PMCID: PMC5804327 DOI: 10.1155/2017/3781525] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Revised: 09/26/2017] [Accepted: 10/22/2017] [Indexed: 01/29/2023]
Abstract
Background This study explored the possible role of FGF23 in pediatric hypercalciuria. Methods Plasma FGF23 was measured in 29 controls and 58 children and adolescents with hypercalciuria: 24 before treatment (Pre-Treated) and 34 after 6 months of treatment (Treated). Hypercalciuric patients also measured serum PTH hormone, 25(OH)vitD, phosphate, calcium, creatinine, and 24 h urine calcium, phosphate, and creatinine. Results There were no differences in age, gender, ethnicity, or body mass index either between controls and patients, or between Pre-Treated and Treated patients. Median plasma FGF23 in controls was 72 compared with all patients, 58 RU/mL (p = 0.0019). However, whereas FGF23 in Pre-Treated patients, 73 RU/mL, was not different from controls, in Treated patients it was 50 RU/mL, significantly lower than in both controls (p < 0.0001) and Pre-Treated patients (p = 0.02). In all patients, there was a correlation between FGF23 and urinary calcium (r = 0.325; p = 0.0014). Treated patients had significantly lower urinary calcium (p < 0.0001), higher TP/GFR (p < 0.001), and higher serum phosphate (p = 0.007) versus Pre-Treated patients. Conclusions Pharmacological treatment of hypercalciuric patients resulted in significantly lower urinary calcium excretion, lower serum FGF23, and elevated TP/GFR and serum phosphate concentration, without significant changes in PTH. Further studies are indicated. This trial is registered with Clinical Registration Number RBR 8W27X5.
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Assimos DG. Re: Stone Growth Patterns and Risk for Surgery among Children Presenting with Hypercalciuria, Hypocitraturia and Cystinuria as Underlying Metabolic Causes of Urolithiasis. J Urol 2018; 199:336. [PMID: 29357553 DOI: 10.1016/j.juro.2017.11.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Alfandary H, Haskin O, Davidovits M, Pleniceanu O, Leiba A, Dagan A. Increasing Prevalence of Nephrolithiasis in Association with Increased Body Mass Index in Children: A Population Based Study. J Urol 2017; 199:1044-1049. [PMID: 29061537 DOI: 10.1016/j.juro.2017.10.023] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/09/2017] [Indexed: 01/29/2023]
Abstract
PURPOSE Epidemiological studies demonstrate an association of increased body mass index and risk of kidney stone formation in adults. We conducted a population based pediatric study to examine the epidemiology of nephrolithiasis in Israeli children during a 30-year period, and to determine body mass index distribution during the same period. MATERIALS AND METHODS We accessed data from the compulsory medical evaluations of 17-year-old military service candidates in Israel before their enlistment during 1980 to 2013. Candidates for the army with a history of stone disease were compared to those without such a history. RESULTS Of 1,908,893 candidates 1,691 reported a history of nephrolithiasis, yielding an average prevalence rate of 88.6 per 100,000. During 1980 to 1995 the average reported prevalence of nephrolithiasis was 69 cases per 100,000. From 1995 onward the reported prevalence increased by an average of 6% yearly, reaching 120 per 100,000 during 2010 to 2012. This increased prevalence was observed for males and females but was more prominent among males. Mean ± SD body mass index of stone formers was higher than that of controls (22.7 ± 3.5 vs 22.1 ± 3.9 kg/m2, p <0.001). The trend of increasing body mass index among male candidates during 1995 to 2012 parallels the trend of increasing nephrolithiasis during these years. The odds ratio for nephrolithiasis in candidates with body mass index 30 or greater kg/m2 was 1.7 (range 1.4 to 2.1) compared to candidates with a body mass index of 18.5 to 24.9 kg/m2. CONCLUSIONS This large, population based study documents an increasing prevalence of nephrolithiasis in children. The possible association of this finding with the increase in body mass index during the same period warrants further investigation.
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Affiliation(s)
- Hadas Alfandary
- Institute of Nephrology, Schneider Children's Medical Center of Israel, Petach Tikva, Israel; Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.
| | - Orly Haskin
- Institute of Nephrology, Schneider Children's Medical Center of Israel, Petach Tikva, Israel; Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Miriam Davidovits
- Institute of Nephrology, Schneider Children's Medical Center of Israel, Petach Tikva, Israel; Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Oren Pleniceanu
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel; Israel Defense Forces Medical Corps, Ramat Gan, Israel
| | - Adi Leiba
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel; Israel Defense Forces Medical Corps, Ramat Gan, Israel
| | - Amit Dagan
- Institute of Nephrology, Schneider Children's Medical Center of Israel, Petach Tikva, Israel; Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
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Singh K, Sokhal AK, Sankhwar S, Purkait B. Nephrolithisis in a newborn: a rare case and review of literature. BMJ Case Rep 2017; 2017:bcr-2016-218391. [PMID: 28775080 DOI: 10.1136/bcr-2016-218391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
Nephrolithiasis, although a common entity in adults, is less common in children and rare in newborns. The evaluation and management strategies of renal stones in neonates are unclear. We report a rare scenario of renal calculus in a newborn aged 3 days presenting with decreased urine output, fever and crying during micturition. Patient was thoroughly investigated and managed conservatively. Further follow-up showed increase in stone size with recurrent urinary tract infections, hence shock wave lithotripsy was performed to successfully break and clear the stone fragments. Patient recovered well and was doing fine until last follow-up.
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Affiliation(s)
- Kawaljit Singh
- Urology, King George Medical University, Lucknow, Uttar Pradesh, India
| | | | | | - Bimalesh Purkait
- Urology, King George Medical University, Lucknow, Uttar Pradesh, India
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Zu'bi F, Sidler M, Harvey E, Lopes RI, Hojjat A, Naoum N, Pokarowski M, Lorenzo AJ, Farhat WA, Papanikolaou F, Dos Santos J. Stone growth patterns and risk for surgery among children presenting with hypercalciuria, hypocitraturia and cystinuria as underlying metabolic causes of urolithiasis. J Pediatr Urol 2017; 13:357.e1-357.e7. [PMID: 28865885 DOI: 10.1016/j.jpurol.2017.06.022] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/07/2017] [Accepted: 06/29/2017] [Indexed: 10/19/2022]
Abstract
INTRODUCTION Hypercalciuria, hypocitraturia and cystinuria are the most common underlying metabolic stone abnormalities in children. The present study compared stone growth patterns, stone burden, and the risk of stone-related surgery among these underlying metabolic conditions. METHODS A retrospective cohort of 356 children with renal stones, followed from 2000 to 2015, was studied. Differences among metabolic groups were determined using Kruskal-Wallis test; the Scheffé-test was used for multiple comparisons to determine differences among single groups. Independent sample t-test was used when adequate, given the sample size, and Chi-squared test was used for categorical variables. Stone growth rates were calculated as differences in diameter divided by time elapsed between U/Ss (mm/year). Logistic regression was performed to assess the effect of initial stone size on the likelihood of surgery. RESULTS Median stone size at presentation was significantly different among groups, with cystinuria being the group with the largest proportion of stones >10 mm, while patients with stones <5 mm were likely to have a normal metabolic workup (P < 0.05). Stones with a higher growth rate were found in the operative group, while slower growing stones were mostly managed conservatively (3.4 mm/year vs 0.8 mm/year, respectively; P = 0.014). However, stone growth rates were not significantly different among metabolic groups. On the other hand, the rate of new stone formation in cystinuric patients at their first follow-up was 30.4%, which was significantly higher than in patients with hypercalciuria (16.3%) or with a normal metabolic workup (17.2%; P < 0.05). Compared with stones <5 mm, stones measuring 5-10 mm were more than four times more likely to result in surgery, whereas the likelihood of surgery for 10-20 mm or >20 mm stones was almost 16 or 34 times, respectively (P < 0.001). CONCLUSIONS It is believed that this is the first study to evaluate stone growth patterns, stone burden and surgical risk among children with hypercalciuria, hypocitraturia and cystinuria. Cystinuric patients presented with larger stones at the time of diagnosis, higher new stone formation rates, and were at higher risk of surgery. While no significant difference of growth rate was found among metabolic groups, stones with a higher growth rate were significantly more likely to result in surgical treatment than slower growing stones. Initial stone size, location of largest stone, previous urinary tract infection, and patient's metabolic type significantly influenced the likelihood of a surgical intervention. Better understanding of the natural history ultimately helps surgeons and clinicians defining prognosis, treatment, and prevention plans for pediatric urolithiasis.
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Affiliation(s)
- F Zu'bi
- Division of Urology, The Hospital for Sick Children, Toronto, ON, Canada
| | - M Sidler
- Department of Neonatal and Paediatric Surgery, Great Ormond Street Hospital, London, UK.
| | - E Harvey
- Division of Urology, The Hospital for Sick Children, Toronto, ON, Canada
| | - R I Lopes
- Division of Urology, The Hospital for Sick Children, Toronto, ON, Canada
| | - Asal Hojjat
- Division of Urology, The Hospital for Sick Children, Toronto, ON, Canada
| | - N Naoum
- Division of Urology, The Hospital for Sick Children, Toronto, ON, Canada
| | - M Pokarowski
- Division of Urology, The Hospital for Sick Children, Toronto, ON, Canada
| | - A J Lorenzo
- Division of Urology, The Hospital for Sick Children, Toronto, ON, Canada
| | - W A Farhat
- Division of Urology, The Hospital for Sick Children, Toronto, ON, Canada
| | - F Papanikolaou
- Division of Urology, The Hospital for Sick Children, Toronto, ON, Canada
| | - J Dos Santos
- Division of Urology, The Hospital for Sick Children, Toronto, ON, Canada
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Taranta-Janusz K, Łabieniec Ł, Porowski T, Szymański K, Porowska H, Wasilewska A. Determining normal values of urinary phosphorus excretion in 3913 healthy children aged 2-18 to aid early diagnosis and treatment for urolithiasis. Acta Paediatr 2017; 106:1170-1175. [PMID: 28370428 DOI: 10.1111/apa.13856] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Revised: 03/16/2017] [Accepted: 03/27/2017] [Indexed: 11/27/2022]
Abstract
AIM This study determined the specific reference values for urinary phosphorus excretion in healthy children and adolescents aged 2-18 years and evaluated whether they changed with age during growth and were gender dependent. METHODS We enrolled 3913 healthy children and adolescents aged 2-18 years to this study. The study population was divided into age groups, and the analysis was performed in one-year periods, separately for boys and girls. Urinary phosphorus excretion was analysed using four categories: P1 in mmol/24 hour units, P2 in mmol/kg/24 hours, P3 in mmol/1.73 m2 /24 hours and P4 in mmol/mmol creatinine. RESULTS Clear differences in urinary exertion for girls and boys were observed as well as systematic changes with age. The boys presented with significantly higher daily urinary phosphorus excretion independent of its manner of expression (p < 0.001). The median urinary phosphorus (P1) rose with age (p < 0.001). Percentile tables of phosphorous exertion are presented. CONCLUSION This was the largest study of urinary phosphate excretion based on a randomly selected sample of girls and boys aged 2-18 years. It highlights the importance of determining phosphorus reference values for children of different ages to provide early diagnosis and treatment for urolithiasis.
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Affiliation(s)
| | | | - Tadeusz Porowski
- Department of Paediatrics and Nephrology; Medical University of Bialystok; Bialystok Poland
| | | | - Halina Porowska
- Department of Medical Chemistry; Medical University of Bialystok; Bialystok Poland
| | - Anna Wasilewska
- Department of Paediatrics and Nephrology; Medical University of Bialystok; Bialystok Poland
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Do Overweight and Obese Pediatric Stone Formers Have Differences in Metabolic Abnormalities Compared With Normal-weight Stone Formers? Urology 2017; 101:26-30. [DOI: 10.1016/j.urology.2016.09.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Revised: 09/01/2016] [Accepted: 09/07/2016] [Indexed: 11/19/2022]
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Moudi E, Ghaffari R, Moradi A. Pediatric Nephrolithiasis: Trend, Evaluation and Management: A Systematic Review. JOURNAL OF PEDIATRICS REVIEW 2016. [DOI: 10.17795/jpr-7785] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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32
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The Modern Metabolic Stone Evaluation in Children. Urology 2016; 101:15-20. [PMID: 27838366 DOI: 10.1016/j.urology.2016.09.058] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Revised: 09/20/2016] [Accepted: 09/21/2016] [Indexed: 12/25/2022]
Abstract
OBJECTIVE To evaluate metabolic abnormalities in a contemporary pediatric population after their first stone episode. The incidence of pediatric nephrolithiasis is increasing and therefore the etiologies contributing to today's pediatric stone formation may also be changing. MATERIALS AND METHODS A retrospective review of all consecutive children presenting after their first kidney stone between 2000 and 2014 was performed. We compared demographic data, serum chemistry results, and 24-hour urine results and treatments. RESULTS One hundred thirteen children with a mean age of 11 years (5 months to 18 years) who presented with their first kidney stone episode between 2000 and 2014 were evaluated. Sixteen patients (14%) were found to have an underlying genetic or systemic disease. Overall, there was a low rate of serum chemistry abnormalities. The most common abnormalities found within the 24-hour urine evaluation included low urine volume (89%) and hypocitraturia (68%). Hypercalciuria occurred rarely (11%). CONCLUSION We identified a low rate of underlying genetic or systemic diseases contributing to modern pediatric stone presentation and an increased proportion of idiopathic stones. Our study differs from historical findings by identifying a low rate of hypercalciuria and a high rate of low urine volume and hypocitraturia, suggestive of changing metabolic abnormalities contributing to modern pediatric stone disease.
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Metabolic disturbances in Chinese children with urolithiasis: a single center report. Urolithiasis 2016; 45:285-290. [PMID: 27510800 DOI: 10.1007/s00240-016-0910-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Accepted: 08/02/2016] [Indexed: 10/21/2022]
Abstract
Urinary stones and urine composition are the first steps in the process of recurrence prevention, but data concerning the association between the two compositions are scarce in Chinese children with urolithiasis. We retrospectively analyzed the records of children (age range 0-18 years) with urolithiasis in our center between March 2004 and December 2013. Stone analysis was carried out in 382 children and 24-hour urine analysis in 80 children. Analysis of both stone and 24-hour urine composition was completed in 56 children. Stone samples were analyzed by Fourier transform-infrared spectrometry. The major stone constituents were calcium oxalate (78.8 %). Of 80 children with 24 h urine analysis, only 2.5 % were without urinary metabolic abnormalities. Hypocitraturia was recorded in 97.5 %, high sodium excretion in 50.0 %, cystinuria in 48.7 %, hypercalciuria in 18.8 %, small urine volumes in 12.5 %, hyperoxaluria in 5.0 % and hyperuricosuria in 1.3 %. Interestingly, higher urine volumes were recorded in girls than in boys (73.2 ± 58.5 vs 51.3 ± 45.3 mL/kg, p = 0.036). Urine sodium (p = 0.002) and oxalate (p = 0.004) were significantly higher in children >9 year old. Moreover, compared with calcium oxalate stone formers, the urine volume (p = 0.040), citrate (p = 0.007) and cystine (p = 0.004) were higher in patients with cystine stones. Hypocitraturia was the common abnormality among Chinese children with urolithiasis. The surprisingly high incidence of cystinuria is of note.
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Abstract
Urolithiasis in children is an underrecognized cause of pediatric abdominal pain. Our case describes a child who presented to the emergency department with right lower quadrant pain, in whom a point-of-care ultrasound detected an ureterovesicular stone, which obviated the need for any further radiographic studies. We review the current literature on pediatric urolithiasis with a focus on sonographic diagnosis.
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Affiliation(s)
- Antonio Riera
- From the Departments of *Pediatric Emergency Medicine and †Diagnostic Radiology, Yale University School of Medicine, New Haven, CT
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35
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Çaltık Yılmaz A, Büyükkaragöz B, Oguz U, Çelik B. Influence of body mass index on pediatric urolithiasis. J Pediatr Urol 2015; 11:350.e1-6. [PMID: 26182848 DOI: 10.1016/j.jpurol.2015.04.039] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2014] [Accepted: 04/13/2015] [Indexed: 11/25/2022]
Abstract
OBJECTIVE In recent years, there has been increased incidence of urolithiasis in children. Changing nutritional patterns and sedentary lifestyles predispose to urolithiasis, as well as to the global rise in obesity. It has been established that the prevalence of high body mass index (BMI) is increasing in the pediatric population. The aim of the present study was to incorporate 24-h urine metabolic analysis results with BMI values to evaluate the tendency towards stone formation in children. METHODS Eighty-four children were recruited to the study, stratified into three BMI categories as low, normal, or upper. All patients were evaluated with 24-h urine analysis results. Patients with a secondary cause of stone formation such as hyperparathyroidism, cystinuria, primary hyperoxaluria, inflammatory bowel disease, cystic fibrosis, history of prematurity and/or use of drug, recurrent urinary tract infection, and urinary tract anomaly were excluded. Additionally, it was ensured that none of the patients were taking specific medication or diet that could alter their acid-base metabolism and calcium, oxalate, and uric acid levels. RESULTS Mean BMI of patients was 21.6 ± 2.9 kg/m(2). LBMI was found in 52 (61.9%), N-BMI in 20 (23.8%), and U-BMI in 12 (14.3%) of the patients. No significant differences were present between the three groups for stone sizes and numbers. The patients' characteristics and 24-h urine parameters for BMI groups are presented in the Table. DISCUSSION In the literature, several studies have focused on the relationship between obesity and pediatric urinary stone disease. However, only a few evaluated the urinary metabolic analysis in pediatric patients. We have encountered different results from mainly adult studies and some pediatric studies. Our study shows that U-BMI children are not under greater risk for urolithiasis than the other groups. An important portion of our study group was in the L-BMI group; nevertheless we cannot conclude that having a low BMI predisposes to urolithiasis based on the urinary metabolic evaluation as well as the stone sizes and numbers. The N-BMI group has increased risk factors for urolithiasis rather than the other groups, according to results of 24-h urine analysis. CONCLUSION The results of our study indicate that BMI itself could not be considered as a separate and definite risk factor for urolithiasis development in children. Although the mechanisms and causative factors for urinary stone formation are better defined in adults, further studies investigating these parameters in children are warranted.
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Affiliation(s)
- Aysun Çaltık Yılmaz
- Ankara Kecioren Training and Research Hospital, Department of Pediatric Nephrology, Ankara, Turkey.
| | - Bahar Büyükkaragöz
- Ankara Kecioren Training and Research Hospital, Department of Pediatric Nephrology, Ankara, Turkey
| | - Ural Oguz
- Ankara Kecioren Training and Research Hospital, Department of Urology, Ankara, Turkey
| | - Bülent Çelik
- Gazi University, Faculty of Arts and Sciences, Department of Statistics, Ankara, Turkey
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Sas DJ, Becton LJ, Tutman J, Lindsay LA, Wahlquist AH. Clinical, demographic, and laboratory characteristics of children with nephrolithiasis. Urolithiasis 2015; 44:241-6. [PMID: 26467033 DOI: 10.1007/s00240-015-0827-8] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2015] [Accepted: 10/03/2015] [Indexed: 10/22/2022]
Abstract
While the incidence of pediatric kidney stones appears to be increasing, little is known about the demographic, clinical, laboratory, imaging, and management variables in this patient population. We sought to describe various characteristics of our stone-forming pediatric population. To that end, we retrospectively reviewed the charts of pediatric patients with nephrolithiasis confirmed by imaging. Data were collected on multiple variables from each patient and analyzed for trends. For body mass index (BMI) controls, data from the general pediatrics population similar to our nephrolithiasis population were used. Data on 155 pediatric nephrolithiasis patients were analyzed. Of the 54 calculi available for analysis, 98 % were calcium based. Low urine volume, elevated supersaturation of calcium phosphate, elevated supersaturation of calcium oxalate, and hypercalciuria were the most commonly identified abnormalities on analysis of 24-h urine collections. Our stone-forming population did not have a higher BMI than our general pediatrics population, making it unlikely that obesity is a risk factor for nephrolithiasis in children. More girls presented with their first stone during adolescence, suggesting a role for reproductive hormones contributing to stone risk, while boys tended to present more commonly at a younger age, though this did not reach statistical significance. These intriguing findings warrant further investigation.
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Affiliation(s)
- David J Sas
- Division of Pediatric Nephrology and Hypertension, Department of Pediatric and Adolescent Medicine, Mayo Clinic, 200 First St. SW, Rochester, MN, 55905, USA.
| | - Lauren J Becton
- Division of Pediatric Nephrology, Department of Pediatrics, Albert Einstein School of Medicine, 1300 Morris Park Ave, Bronx, NY, 10461, USA
| | - Jeffrey Tutman
- University of Utah Department of Radiology, 30 North 1900 East #1A071, Salt Lake City, UT, 84132, USA
| | - Laura A Lindsay
- Children's Emergency Services, Dayton Children's Hospital, 1 Children's Plaza, Dayton, OH, 45404, USA
| | - Amy H Wahlquist
- Division of Biostatistics and Epidemiology, Department of Medicine, Medical University of South Carolina, 96 Jonathan Lucas St., Suite 803 MSC 623, Charleston, SC, 29425, USA
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Penido MGMG, Tavares MDS. Pediatric primary urolithiasis: Symptoms, medical management and prevention strategies. World J Nephrol 2015; 4:444-454. [PMID: 26380196 PMCID: PMC4561842 DOI: 10.5527/wjn.v4.i4.444] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Revised: 04/27/2015] [Accepted: 07/23/2015] [Indexed: 02/06/2023] Open
Abstract
In the past few decades pediatric urolithiasis has become more frequent. The reason for this increase is not completely clear but has been attributed to changes in climate, nutritional habits and possibly other environmental factors. Although less frequent than adult stone disease, urolithiasis in the pediatric age group is also related to significant morbidity, particularly since stones tend to recur, and, thus, should not be underestimated. Most children with idiopathic stone disease have an underlying metabolic abnormality substantiating the importance of metabolic evaluation already following initial diagnosis of urolithiasis. Identification of the metabolic abnormality allows for more specific prescription of non pharmacological and pharmacological interventions aimed at preventing recurrent stone formation. A better understanding of the causes of kidney stone disease will provide better strategies for stone prevention in children.
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Kirejczyk JK, Korzeniecka-Kozerska A, Baran M, Porowska H, Porowski T, Wasilewska A. Dyslipidaemia in overweight children and adolescents is associated with an increased risk of kidney stones. Acta Paediatr 2015; 104:e407-13. [PMID: 26096629 DOI: 10.1111/apa.13079] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2015] [Revised: 05/03/2015] [Accepted: 06/09/2015] [Indexed: 01/08/2023]
Abstract
AIM There is conflicting evidence about the role of obesity in paediatric nephrolithiasis. This Polish study explored the influence of nutritional status and lipid disturbances on urinary lithogenic factors and the risk of kidney stone formation in children and adolescents from three to 18 years of age. METHODS We carried out serum lipid profile evaluations and 24-h urine chemistry analyses on 493 overweight/obese paediatric participants (mean age 13 years) without nephrolithiasis and 492 healthy normal weight sex and age-matched controls. RESULTS A third (33%) of the study group had blood lipid disturbances, with more acidic urine, lower urinary citrate excretion and a higher fraction of ionised calcium and higher Bonn Risk Index than the controls. The participants' body mass index standard deviation score (BMI Z-score) was positively correlated with urinary oxalate and uric acid and negatively correlated with citrate excretion. Total cholesterol, low-density lipoprotein cholesterol and triglycerides correlated negatively with citraturia, while high-density lipoprotein cholesterol correlated positively. CONCLUSION The main factor that predisposed overweight and obese children to kidney stones was hypocitraturia. Urinary citrate excretion was related to both BMI Z-scores and all lipid fraction abnormalities. However, hypercholesterolaemia and particularly low-density lipoprotein hypercholesterolaemia seemed to play a major role.
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Affiliation(s)
- J K Kirejczyk
- Department of Paediatric Surgery; Medical University of Bialystok; Bialystok Poland
| | - A Korzeniecka-Kozerska
- Department of Paediatrics and Nephrology; Medical University of Bialystok; Bialystok Poland
| | - M Baran
- Department of Paediatrics, Endocrinology; Diabetology with Cardiology Division; Medical University of Bialystok; Bialystok Poland
| | - H Porowska
- Department of Medical Chemistry; Medical University of Bialystok; Bialystok Poland
| | - T Porowski
- Department of Paediatrics and Nephrology; Medical University of Bialystok; Bialystok Poland
| | - A Wasilewska
- Department of Paediatrics and Nephrology; Medical University of Bialystok; Bialystok Poland
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Does obesity or hyperuricemia influence lithogenic risk profile in children with urolithiasis? Pediatr Nephrol 2015; 30:797-803. [PMID: 25380789 PMCID: PMC4372672 DOI: 10.1007/s00467-014-2999-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/25/2014] [Revised: 10/09/2014] [Accepted: 10/22/2014] [Indexed: 11/29/2022]
Abstract
BACKGROUND There are indications that obesity and hyperuricemia may influence the formation and composition of urinary stones. The aim of our study was to determine the effect of obesity and hyperuricemia on the urinary lithogenic risk profile in a large cohort of pediatric patients. METHODS The study population comprised 478 children with urolithiasis and 517 healthy children (reference group). We studied the effects of obesity on the lithogenic profile by dividing the patients with urolithiasis into two groups based on body mass index Z-score (patients who were overweight/obese vs. those with normal weight for age) and comparing the two groups. To study the effect of hyperuricemia on the lithogenic profile, we divided the patients with urolithiasis into two groups based on the presence or not of hyperuricemia (110 patients with urolithiasis accompanied by hyperuricemia vs. 368 patients with urolithiasis and normal serum uric acid levels) and compared the groups. RESULTS Among the children and adolescents with urolithiasis and hyperuricemia, there was a significantly lower excretion of crystallization inhibitors (citrates, magnesium). We also found significantly negative correlations between serum uric acid levels and the urine citrate/creatinine ratio (citrate/cr.; r = -0.30, p < 0.01), as well as the magnesium/cr. ratio (Mg/cr.; r = -0.33, p < 0.01). There was no statistically significant differences in the urinary excretion of oxalates, citrates, calcium, phosphorus, magnesium and uric acid between children with urolithiasis who were either overweight or obese and children with urolithiasis who had a normal body weight. CONCLUSIONS In our pediatric patient cohort, hyperuricemia was associated with a decrease in the excretion of crystallization inhibitors in the urine, but the clinical relevance of this observation needs to be confirmed in future studies. Obesity and overweight had no direct influence on the lithogenic risk profile in the urinary stone formers in our study, but there was an indication that higher serum uric acid may be associated with impairment in renal function, which in turn could influence the excretion of lithogenic parameters.
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Roddy JT, Ghousheh AI, Christensen MA, Durkee CT. Metabolic Evaluation of Urolithiasis and Obesity in a Midwestern Pediatric Population. J Urol 2014; 191:771-6. [DOI: 10.1016/j.juro.2013.09.064] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/27/2013] [Indexed: 10/26/2022]
Affiliation(s)
| | | | | | - Charles T. Durkee
- Department of Urology, Children's Hospital of Wisconsin, Milwaukee, Wisconsin
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Penido MGMG, Tavares MDS, Guimarães MMM, Srivastava T, Alon US. American and Brazilian Children With Primary Urolithiasis: Similarities and Disparities. Glob Pediatr Health 2014; 1:2333794X14561289. [PMID: 27335922 PMCID: PMC4804672 DOI: 10.1177/2333794x14561289] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Objectives. Considering the differences in location, socioeconomic background, and cultural background, the aim of this study was to try to identify possible factors associated with the increased incidence of urolithiasis by comparing American and Brazilian children with stones. Methods. Data of 222 American and 190 Brazilian children with urolithiasis were reviewed including age, gender, body mass index, imaging technique used (ultrasound and computed tomography), and 24-hour urine volume and chemistries. Results. There were no differences between age and gender at diagnosis. Brazilian children were leaner but in no population did obesity rate exceed that of the general population. Ultrasound was most commonly used to diagnose stones, even more so in Brazilians. Decreased urine flow was more common among Americans (P = .004), hypercalciuria among Brazilians (P = .001), and elevated Ca/citrate ratio among Americans (P = .009). There were no differences between the groups in the frequency of hypocitraturia, hyperuricosuria, absorptive hyperoxaluria, and cystinuria. Conclusions. Despite some differences between the populations, the leading causes of urolithiasis among both were “oliguria,” hypercalciuria, and high Ca/citrate ratio. In neither country was obesity the reason for the increase in incidence of urolithiasis, nor was the use of computed tomography. The similarities between the 2 populations call for combining efforts in addressing the leading causes of pediatric urolithiasis.
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