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Chandra T, Bajaj M, Iyer RS, Chan SS, Bardo DME, Chen J, Cooper ML, Kaplan SL, Levin TL, Moore MM, Peters CA, Saidinejad M, Schooler GR, Shet NS, Squires JH, Trout AT, Pruthi S. ACR Appropriateness Criteria® Urinary Tract Infection-Child: 2023 Update. J Am Coll Radiol 2024; 21:S326-S342. [PMID: 38823954 DOI: 10.1016/j.jacr.2024.02.025] [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: 02/20/2024] [Accepted: 02/28/2024] [Indexed: 06/03/2024]
Abstract
Urinary tract infection (UTI) is a frequent infection in childhood. The diagnosis is usually made by history and physical examination and confirmed by urine analysis. Cystitis is infection or inflammation confined to the bladder, whereas pyelonephritis is infection or inflammation of kidneys. Pyelonephritis can cause renal scarring, which is the most severe long-term sequela of UTI and can lead to accelerated nephrosclerosis, leading to hypertension and chronic renal failure. The role of imaging is to guide treatment by identifying patients who are at high risk to develop recurrent UTIs or renal scarring. This document provides initial imaging guidelines for children presenting with first febrile UTI with appropriate response to medical management, atypical or recurrent febrile UTI, and follow-up imaging for children with established vesicoureteral reflux. The American College of Radiology Appropriateness Criteria are evidence-based guidelines for specific clinical conditions that are reviewed annually by a multidisciplinary expert panel. The guideline development and revision process support the systematic analysis of the medical literature from peer reviewed journals. Established methodology principles such as Grading of Recommendations Assessment, Development, and Evaluation or GRADE are adapted to evaluate the evidence. The RAND/UCLA Appropriateness Method User Manual provides the methodology to determine the appropriateness of imaging and treatment procedures for specific clinical scenarios. In those instances where peer reviewed literature is lacking or equivocal, experts may be the primary evidentiary source available to formulate a recommendation.
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Affiliation(s)
| | - Manish Bajaj
- Research Author, Children's Healthcare of Atlanta and Emory University, Atlanta, Georgia
| | - Ramesh S Iyer
- Panel Chair, Seattle Children's Hospital, Seattle, Washington
| | - Sherwin S Chan
- Panel Vice Chair, Children's Mercy Hospital, Kansas City, Missouri
| | - Dianna M E Bardo
- Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, Illinois
| | - Jimmy Chen
- University of Florida College of Medicine Jacksonville, Jacksonville, Florida; American Academy of Pediatrics
| | | | - Summer L Kaplan
- Children's Hospital of Philadelphia, Philadelphia, Pennsylvania; Committee on Emergency Radiology-GSER
| | - Terry L Levin
- The Children's Hospital at Montefiore, Albert Einstein College of Medicine, Bronx, New York
| | | | - Craig A Peters
- University of Texas Southwestern Medical Center, Dallas, Texas; Society for Pediatric Urology
| | - Mohsen Saidinejad
- UCLA Medical Center, Los Angeles, California; American College of Emergency Physicians
| | - Gary R Schooler
- University of Texas Southwestern Medical Center, Dallas, Texas
| | - Narendra S Shet
- Children's National Hospital, Washington, District of Columbia
| | - Judy H Squires
- UPMC Children's Hospital of Pittsburgh, Pittsburgh, Pennsylvania
| | - Andrew T Trout
- Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio; Commission on Nuclear Medicine and Molecular Imaging
| | - Sumit Pruthi
- Specialty Chair, Vanderbilt Children's Hospital, Nashville, Tennessee
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Chin J, Vali R, Charron M, Shammas A. Update on Pediatric Nuclear Medicine in Acute Care. Semin Nucl Med 2023; 53:820-839. [PMID: 37211467 DOI: 10.1053/j.semnuclmed.2023.04.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Revised: 04/24/2023] [Accepted: 04/29/2023] [Indexed: 05/23/2023]
Abstract
Various radiopharmaceuticals are available for imaging pediatric patients in the acute care setting. This article focuses on the common applications used on a pediatric patient in acute care. To confirm the clinical diagnosis of brain death, brain scintigraphy is considered accurate and has been favorably compared with other methods of detecting the presence or absence of cerebral blood flow. Ventilation-perfusion lung scans are easy and safe to perform with less radiation exposure than computed tomography pulmonary angiography and remain an appropriate procedure to perform on children with suspected pulmonary embolism as a first imaging test in a hemodynamically stable patient with no history of lung disease and normal chest radiograph. 99mTc-pertechnetate scintigraphy (Meckel's scan) is the best noninvasive procedure to establish the diagnosis of ectopic gastric mucosa in Meckel's diverticulum. 99mTcred blood cell scintigraphy generally is useful for assessing lower GI bleeding in patients from any cause. Hepatobiliary scintigraphy is the most accurate diagnostic imaging modality for acute cholecystitis. 99mTc-dimercaptosuccinic acid scintigraphy is the simplest, and the most reliable and sensitive method for the early diagnosis of focal or diffuse functional cortical damage. 99mTcmercaptoacetyltriglycine scintigraphy is used to evaluate for early and late complications of renal transplantation. Bone scintigraphy is a sensitive and noninvasive technique for diagnosis of bone disorders such as osteomyelitis and fracture. 18F-fluorodeoxyglucose-positron emission tomography could be valuable in the evaluation of fever of unknown origin in pediatric patients, with better sensitivity and significantly less radiation exposure than a gallium scan. Moving forward, further refinement of pediatric radiopharmaceutical administered activities, including dose reduction, greater radiopharmaceutical applications, and updated consensus guidelines is warranted, with the use of radionuclide imaging likely to increase.
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Affiliation(s)
- Joshua Chin
- Diagnostic Imaging, Nuclear Medicine Division, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - Reza Vali
- Diagnostic Imaging, Nuclear Medicine Division, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada.
| | - Martin Charron
- Diagnostic Imaging, Nuclear Medicine Division, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - Amer Shammas
- Diagnostic Imaging, Nuclear Medicine Division, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
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Is technetium-99m dimercaptosuccinic acid renal scintigraphy available for predicting vesicoureteral reflux in children with first febrile urinary tract infection under the age of 24 months? Nucl Med Commun 2022; 43:1128-1135. [PMID: 36164706 DOI: 10.1097/mnm.0000000000001616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
OBJECTIVE Vesicoureteral reflux (VUR) is a common complication after urinary tract infection (UTI) and can lead to irreversible renal scar. Voiding cystourethrogram is the most reliable technology to detect VUR and its severity, but it is restricted in children's examinations for various shortcomings. This study aimed to evaluate and compare the efficiency of Tc-99m DMSA renal scintigraphy and conventional ultrasonography (USG) in predicting VUR with the gold standard of cystourethrogram results. METHODS This retrospective study consisted of 285 first febrile UTI children under the age of 24 months who completed inflammatory indicator examinations, USG, Tc-99m DMSA renal scintigraphy and underwent cystourethrography after controlling infection with prophylactic antibiotics. The efficiency of Tc-99m DMSA renal scintigraphy and USG in predicting VUR was calculated and compared. RESULTS Abnormal USG (40.23% vs. 21.72%, P = 0.001) and Tc-99m DMSA renal scintigraphy results (87.36% vs. 71.72%, P = 0.004) were more common in VUR children. The sensitivity of USG in predicting VUR was only 40.23%, whereas the sensitivity and negative predictive value of Tc-99m DMSA renal scintigraphy reached 87.63 and 83.58%, respectively. Tc-99m DMSA renal scintigraphy had a higher efficacy than USG in predicting high-grade reflux kidneys (73.87% vs. 33.33%; P < 0.001), but there was no significant difference in predicting low-grade reflux kidneys ( P = 0.703). CONCLUSION Tc-99m DMSA renal scintigraphy had a significant higher efficiency in predicting VUR (a common cause of renal scarring, detected on DMSA) in first febrile urinary tract infection children under the age of 24 months as compared with USG, especially in high-grade reflux.
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Correlation of Renal Scarring to Urinary Tract Infections and Vesicoureteral Reflux in Children. Adv Urol 2022; 2022:9697931. [PMID: 35529476 PMCID: PMC9072046 DOI: 10.1155/2022/9697931] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Accepted: 04/01/2022] [Indexed: 11/18/2022] Open
Abstract
Objective To study the association of the grade of vesicoureteral reflux (VUR) and urinary tract infections (UTI) with renal scarring at the first clinical presentation of patients who underwent antireflux surgery. Materials and methods. Between 2015 and 2020, 150 patients (194 units) who underwent antireflux surgery had dimercaptosuccinic acid (DMSA) renal scans preoperatively. Patients were classified into the nonscar and scar groups according to DMSA scan results. Moreover, cases were classified into afebrile UTI, febrile UTI, and antenatal hydronephrosis (ANH) according to the mode of presentation. We correlated the mode of presentation and the grade of VUR to the presence/absence of renal scars in both groups. Results The mean follow-up was 45 months preoperatively. The mode of presentation was afebrile, febrile UTIs, and antenatal hydronephrosis in (50, 14), (20, 46), and (10, 10) patients in the nonscar and scar groups, respectively. Of the 20 patients who presented ANH, 10 (50%) had scars. Clinical presentation was correlated to the presence of renal scarring and its degree. The scar group had significantly higher grades of VUR than the nonscar group (grades I–II (50 units versus 10 units), grade III (28 units versus 40 units), and grade IV–V (22 units versus 44 units) for the nonscar versus scar groups, respectively (pvalue <0.001). Conclusion Renal scarring is associated with higher grades of reflux and urinary tract infections. We advocate further research investigating infants who had UTIs with or without fever for early detection of reflux.
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Diagnostic performance of contrast-enhanced ultrasound for acute pyelonephritis in children. Sci Rep 2020; 10:10715. [PMID: 32612243 PMCID: PMC7330043 DOI: 10.1038/s41598-020-67713-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Accepted: 06/05/2020] [Indexed: 11/30/2022] Open
Abstract
The objective of our study was to evaluate the performance of renal contrast-enhanced ultrasound (CEUS) against the 99m-labeled dimercaptosuccinic acid (DMSA) scan and computed tomography (CT) in children for the diagnosis of acute pyelonephritis. We included children who underwent both renal CEUS and the DMSA scan or CT. A total of 33 children (21 males and 12 females, mean age 26 ± 36 months) were included. Using the DMSA scan as the reference standard, the sensitivity, specificity, positive predictive value, and negative predictive value of CEUS was 86.8%, 71.4%, 80.5%, and 80.0%, respectively. When CT was used as the reference standard, the sensitivity, specificity, positive predictive value, and negative predictive value of CEUS was 87.5%, 80.0%, 87.5%, and 80.0%, respectively. The diagnostic accuracy of CEUS for the diagnosis of acute pyelonephritis was 80.3% and 84.6% compared to the DMSA scan and CT, respectively. Inter-observer (kappa = 0.54) and intra-observer agreement (kappa = 0.59) for renal CEUS was moderate. In conclusion, CEUS had good diagnostic accuracy for diagnosing acute pyelonephritis with moderate inter- and intra-observer agreement. As CEUS does not require radiation or sedation, it could play an important role in the future when diagnosing acute pyelonephritis in children.
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Guarino S, Capalbo D, Martin N, Campana G, Rambaldi PF, Miraglia Del Giudice E, La Manna A, Marzuillo P. In children with urinary tract infection reduced kidney length and vesicoureteric reflux predict abnormal DMSA scan. Pediatr Res 2020; 87:779-784. [PMID: 31726462 DOI: 10.1038/s41390-019-0676-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Revised: 10/24/2019] [Accepted: 10/31/2019] [Indexed: 11/09/2022]
Abstract
BACKGROUND To evaluate sensitivity, specificity, and positive and negative predictive values (PPV and NPV, respectively) of renal ultrasonography (US) in predicting renal uptake defects or reduced renal function at Tc-99m dimercaptosuccinic acid (DMSA) scan (primary outcome). We also evaluated which factors could be associated with Tc-99m DMSA renal scan anomalies. METHODS We retrospectively included all the patients with vesico-ureteral reflux (VUR) undergoing the first Tc-99m DMSA renal scan within 3 months from the most recent renal US between 2016 and 2018. RESULTS Sensitivity, specificity, PPV, and NPV of US in predicting abnormal Tc-99m DMSA scan were 38.9%, 91.5%, 71.9%, and 72.9%, respectively. Different length between the kidneys, expressed as standard deviation score (SDS), showed an area under the receiver operating characteristic curve of 0.70 (95% CI, 0.60-0.80; p < 0.0001) when evaluated as predictor of abnormal Tc-99m DMSA scan. A different length between the two kidneys >1.11 SDS had 91.5% sensitivity and 57.6% specificity. At multivariate analysis, the factors with significantly increased odds ratio of abnormal Tc-99m DMSA scan were difference in length between two kidneys >1.11 SDS and dilated VUR. CONCLUSIONS The Tc-99m DMSA scan remains the gold standard to detect renal parenchymal anomalies. A different length between the kidneys >1.11 SDS and dilated VUR are predictors of abnormal Tc-99m DMSA renal scan.
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Affiliation(s)
- Stefano Guarino
- Department of Woman, Child and of General and Specialized Surgery, Università della Campania "Luigi Vanvitelli", Via Luigi De Crecchio 2, 80138, Napoli, Italy
| | - Daniela Capalbo
- Department of Woman, Child and of General and Specialized Surgery, Università della Campania "Luigi Vanvitelli", Via Luigi De Crecchio 2, 80138, Napoli, Italy
| | - Nunzia Martin
- Department of Woman, Child and of General and Specialized Surgery, Università della Campania "Luigi Vanvitelli", Via Luigi De Crecchio 2, 80138, Napoli, Italy
| | - Giuseppina Campana
- Department of Woman, Child and of General and Specialized Surgery, Università della Campania "Luigi Vanvitelli", Via Luigi De Crecchio 2, 80138, Napoli, Italy
| | - Pier Francesco Rambaldi
- Department of Radiological Sciences, Università della Campania "Luigi Vanvitelli", Naples, Italy
| | - Emanuele Miraglia Del Giudice
- Department of Woman, Child and of General and Specialized Surgery, Università della Campania "Luigi Vanvitelli", Via Luigi De Crecchio 2, 80138, Napoli, Italy
| | - Angela La Manna
- Department of Woman, Child and of General and Specialized Surgery, Università della Campania "Luigi Vanvitelli", Via Luigi De Crecchio 2, 80138, Napoli, Italy
| | - Pierluigi Marzuillo
- Department of Woman, Child and of General and Specialized Surgery, Università della Campania "Luigi Vanvitelli", Via Luigi De Crecchio 2, 80138, Napoli, Italy.
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Finkelstein JB, Rague JT, Chow J, Venna A, Logvinenko T, Nelson CP, Lee RS. Accuracy of Ultrasound in Identifying Renal Scarring as Compared to DMSA Scan. Urology 2020; 138:134-137. [PMID: 32004557 DOI: 10.1016/j.urology.2020.01.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Revised: 01/13/2020] [Accepted: 01/17/2020] [Indexed: 11/17/2022]
Abstract
OBJECTIVE To assess the accuracy of renal ultrasound (RUS) in detecting renal scarring (RS). METHODS All initial DMSA scans performed from 2006 to 2009 for history of urinary tract infection (UTI) or vesicoureteral reflux (VUR) in patients under 14 years old were identified, and clinical history obtained via chart review. Patients who had RUS within 4 months of DMSA scan and no documented UTI during that interval were included. Decreased uptake of tracer associated with loss of contours or cortical thinning defined a positive DMSA study. Increased echogenicity/dysplasia, cortical thinning, atrophic kidney and/or abnormal corticomedullary differentiation defined a positive RUS. The sensitivity and specificity of RUS in identifying RS were calculated using DMSA scan as the gold standard. RESULTS A total of 144 patients had initial DMSA scans performed for UTI or VUR, with a RUS within 4 months, and no UTI between the 2 studies. Ninety-five of 144 (66%) had RS on DMSA and 49/144 (34%) did not. Patients with or without RS on DMSA were not different in gender (P = .073), age (P = .432), insurance (P = 1.000) or VUR grade (P = .132). Only 39/144 (27.1%) patients had positive RUS. The sensitivity of RUS for RS was 35.8% and the specificity was 89.8%, leading to an accuracy of 54.2% (95%CI; 45.7-62.5%, P = .999). CONCLUSION RUS demonstrated poor sensitivity for RS visualized on DMSA scan. This suggests that RUS is a poor screening test for RS or indicators of future renal scar. A normal ultrasound does not rule out RS or risk of future renal scar. Specificity of RUS was excellent.
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Affiliation(s)
| | - James T Rague
- Department of Urology, Boston Medical Center, Boston, MA
| | - Jeanne Chow
- Department of Radiology, Boston Children's Hospital, Boston, MA
| | - Alyssia Venna
- Department of Urology, Boston Children's Hospital, Boston, MA
| | | | - Caleb P Nelson
- Department of Urology, Boston Children's Hospital, Boston, MA
| | - Richard S Lee
- Department of Urology, Boston Children's Hospital, Boston, MA.
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Choi HG, Lee JY, Oh CE. Empirical antibiotics for recurrent urinary tract infections in children. KOSIN MEDICAL JOURNAL 2018. [DOI: 10.7180/kmj.2018.33.2.159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
The purpose of this study was to compare antibiotic resistance patterns between first urinary tract infection (UTI) and recurrent UTI groups and to obtain information regarding empirical antibiotic selection for treating recurrent UTI. Methods We retrospectively reviewed 148 children treated for UTIs from January 2009 to June 2016. The patients were divided into two groups: first UTI (N = 148) and recurrent UTI (17 patients and 20 episodes). Results In both groups, Escherichia coli was the most frequent causative organism, accounting for 89.9% and 75.0% in the first and recurrent UTI groups, respectively. When E. coli or Klebsiella pneumoniae was the causative organism, extended-spectrum β-lactamase (ESBL)-producing organisms were more frequent in the recurrent UTI group (17.6%) than in the first UTI group (14.0%); however, this difference was not statistically significant (P = 0.684). Cefotaxime was the most frequently used first-line empirical antibiotic in both groups. In the first UTI and recurrent UTI groups, 7.4% and 15.0% of patients were treated with intravenous antibiotics as definitive therapy, respectively (P = 0.250). Fifteen out of 17 patients having a second UTI had different causative organisms or antibiotic susceptibility patterns compared to their previous episode. Conclusions Escherichia coli was the most frequent causative organism in the recurrent UTI group. There were no differences in the proportion of ESBL-producing organisms between the first UTI and recurrent UTI groups. Therefore, when a UTI recurs in children, the antibiotics effective on the most common causative organism might be administered as empirical antibiotics.
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Karmazyn BK, Alazraki AL, Anupindi SA, Dempsey ME, Dillman JR, Dorfman SR, Garber MD, Moore SG, Peters CA, Rice HE, Rigsby CK, Safdar NM, Simoneaux SF, Trout AT, Westra SJ, Wootton-Gorges SL, Coley BD. ACR Appropriateness Criteria ® Urinary Tract Infection-Child. J Am Coll Radiol 2018; 14:S362-S371. [PMID: 28473093 DOI: 10.1016/j.jacr.2017.02.028] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Revised: 02/20/2017] [Accepted: 02/21/2017] [Indexed: 11/15/2022]
Abstract
Urinary tract infection (UTI) is common in young children and may cause pyelonephritis and renal scarring. Long-term complications from renal scarring are low. The role of imaging is to evaluate for underlying urologic abnormalities and guide treatment. In neonates there is increased risk for underlying urologic abnormalities. Evaluation for vesicoureteral reflux (VUR) may be appropriate especially in boys because of higher prevalence of VUR and to exclude posterior urethral valve. In children older than 2 months with first episode of uncomplicated UTI, there is no clear benefit of prophylactic antibiotic. Ultrasound is the only study that is usually appropriate. After the age of 6 years, UTIs are infrequent. There is no need for routine imaging as VUR is less common. In children with recurrent or complicated UTI, in addition to ultrasound, imaging of VUR is usually appropriate. Renal cortical scintigraphy may be appropriate in children with VUR, as renal scarring may support surgical intervention. The American College of Radiology Appropriateness Criteria are evidence-based guidelines for specific clinical conditions that are reviewed annually by a multidisciplinary expert panel. The guideline development and revision include an extensive analysis of current medical literature from peer reviewed journals and the application of well-established methodologies (RAND/UCLA Appropriateness Method and Grading of Recommendations Assessment, Development, and Evaluation or GRADE) to rate the appropriateness of imaging and treatment procedures for specific clinical scenarios. In those instances where evidence is lacking or equivocal, expert opinion may supplement the available evidence to recommend imaging or treatment.
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Affiliation(s)
- Boaz K Karmazyn
- Principal Author and Panel Chair, Riley Hospital for Children, Indiana University, Indianapolis, Indiana.
| | | | | | | | | | | | - Matthew D Garber
- Wolfson Children's Hospital, Jacksonville, Florida; American Academy of Pediatrics
| | | | - Craig A Peters
- UT Southwestern Medical Center, Dallas, Texas; Society for Pediatric Urology
| | - Henry E Rice
- Duke University Medical Center, Durham, North Carolina; American Pediatric Surgical Association
| | - Cynthia K Rigsby
- Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, Illinois
| | - Nabile M Safdar
- Children's National Medical Center, Washington, District of Columbia
| | | | - Andrew T Trout
- Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | | | | | - Brian D Coley
- Specialty Chair, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
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Unenhanced MRI as an Alternative to 99mTc-Labeled Dimercaptosuccinic Acid Scintigraphy in the Detection of Pediatric Renal Scarring. AJR Am J Roentgenol 2018; 210:869-875. [PMID: 29446671 DOI: 10.2214/ajr.17.18379] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
OBJECTIVE The purpose of this study was to determine whether unenhanced MRI without sedation is a feasible substitute for dimercaptosuccinic acid (DMSA) scintigraphy in the detection of renal scars in pediatric patients. SUBJECTS AND METHODS Patients scheduled for 99mTc-labeled DMSA scintigraphy for assessment of possible renal scars were recruited to undergo unenhanced MRI (free-breathing fat-suppressed T2-weighted single-shot turbo spin-echo and T1-weighted gradient-echo imaging, 13 minutes' total imaging time). Scintigraphic and MRI studies were evaluated by two independent blinded specialty-based radiologists. For each imaging examination, readers identified scars in upper, middle, and lower kidney zones and rated their diagnostic confidence and the quality of each study. The scintigraphic readers' consensus score opinion for the presence of scars was considered the reference standard. RESULTS DMSA scintigraphy showed scarring in 19 of the 78 (24.4%) evaluated zones and MRI in 18 of the 78 (23.1%). The two MRI readers found mean sensitivities of 94.7% and 89.5%, identical specificities of 100%, and diagnostic accuracies of 98.7% and 97.4%. Interobserver agreement was 98.7% for MRI and 92.3% for DMSA scintigraphy. The MRI readers were significantly more confident in determining the absence rather than the presence of scars (p = 0.02). MRI readers were more likely to rate study quality as excellent (84.6%) than were the scintigraphic readers (57.7%) (p = 0.024). CONCLUSION Unenhanced MRI has excellent sensitivity, specificity, diagnostic accuracy, and interobserver agreement for detecting renal scars in older children who do not need sedation. It may serve as a substitute modality, especially when DMSA is not available.
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Marceau-Grimard M, Marion A, Côté C, Bolduc S, Dumont M, Moore K. Dimercaptosuccinic acid scintigraphy vs. ultrasound for renal parenchymal defects in children. Can Urol Assoc J 2017; 11:260-264. [PMID: 28798828 DOI: 10.5489/cuaj.4257] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
INTRODUCTION Dimercaptosuccinic acid (DMSA) scintigraphy is the gold standard in the evaluation of renal parenchymal defects and is widely used in the pediatric population. As more recent ultrasound equipment was purchased at our tertiary pediatric centre, our objective was to evaluate if renal ultrasound (US) results are equivalent or sufficient when compared to DMSA scintigraphy in the assessment of renal anomalies. METHODS The charts of all 463 patients who underwent DMSA scintigraphy between January 2009 and May 2014 at our pediatric tertiary centre were reviewed. The objective was to look for correlation between US and DMSA scan results for renal scars/dysplasia. A hundred and sixty pediatric patients followed with US and DMSA scan for a total of 285 renal units remained for evaluation after exclusions. Timing of the exams, urinary tract infection (UTI), and indication for imaging were reviewed. Results with older (105 patients) and newer (55 patients) US equipment were compared. RESULTS Among the 285 renal units evaluated, 39 (14%) had renal parenchymal defects shown by US and 87 (31%) by DMSA scintigraphy (sensitivity 36%, specificity 96%). The DMSA scan was normal for eight abnormal kidneys (3%) on US. The results were not statistically significant when compared to exams performed with newer or older US machines. CONCLUSIONS At our institution, US data are not sensitive enough to give reliable information about renal parenchymal defects, even with newer equipment. DMSA scintigraphy still remains mandatory for the evaluation of renal anomalies, but could be optional if the US exam indicates parenchymal defects.
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Affiliation(s)
- Maryse Marceau-Grimard
- Division of Urology, Department of Surgery; CHU de Québec, Université Laval, Quebec City, QC, Canada
| | - Audrey Marion
- Division of Urology, Department of Surgery; CHU de Québec, Université Laval, Quebec City, QC, Canada
| | - Christian Côté
- Division of Nuclear Medicine, Department of Medical Imaging; CHU de Québec, Université Laval, Quebec City, QC, Canada
| | - Stephane Bolduc
- Division of Urology, Department of Surgery; CHU de Québec, Université Laval, Quebec City, QC, Canada
| | - Marcel Dumont
- Division of Nuclear Medicine, Department of Medical Imaging; CHU de Québec, Université Laval, Quebec City, QC, Canada
| | - Katherine Moore
- Division of Urology, Department of Surgery; CHU de Québec, Université Laval, Quebec City, QC, Canada
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Shaikh N, Spingarn RB, Hum SW. Dimercaptosuccinic acid scan or ultrasound in screening for vesicoureteral reflux among children with urinary tract infections. Cochrane Database Syst Rev 2016; 7:CD010657. [PMID: 27378557 PMCID: PMC6457894 DOI: 10.1002/14651858.cd010657.pub2] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
BACKGROUND There is considerable interest in detecting vesicoureteral reflux (VUR) because its presence, especially when severe, has been linked to an increased risk of urinary tract infections and renal scarring. Voiding cystourethrography (VCUG), also known as micturating cystourethrography, is the gold standard for the diagnosis of VUR, and the grading of its severity. Because VCUG requires bladder catheterisation and exposes children to radiation, there has been a growing interest in other screening strategies that could identify at-risk children without the risks and discomfort associated with VCUG. OBJECTIVES The objective of this review is to evaluate the accuracy of two alternative imaging tests - the dimercaptosuccinic acid renal scan (DMSA) and renal-bladder ultrasound (RBUS) - in diagnosing VUR and high-grade VUR (Grade III-V VUR). SEARCH METHODS We searched MEDLINE, EMBASE, BIOSIS, and the Cochrane Register of Diagnostic Test Accuracy Studies from 1985 to 31 March 2016. The reference lists of relevant review articles were searched to identify additional studies not found through the electronic search. SELECTION CRITERIA We considered published cross-sectional or cohort studies that compared the results of the index tests (DMSA scan or RBUS) with the results of radiographic VCUG in children less than 19 years of age with a culture-confirmed urinary tract infection. DATA COLLECTION AND ANALYSIS Two authors independently applied the selection criteria to all citations and independently abstracted data. We used the bivariate model to calculate summary sensitivity and specificity values. MAIN RESULTS A total of 42 studies met our inclusion criteria. Twenty studies reported data on the test performance of RBUS in detecting VUR; the summary sensitivity and specificity estimates were 0.44 (95% CI 0.34 to 0.54) and 0.78 (95% CI 0.68 to 0.86), respectively. A total of 11 studies reported data on the test performance of RBUS in detecting high-grade VUR; the summary sensitivity and specificity estimates were 0.59 (95% CI 0.45 to 0.72) and 0.79 (95% CI 0.65 to 0.87), respectively. A total of 19 studies reported data on the test performance of DMSA in detecting VUR; the summary sensitivity and specificity estimates were 0.75 (95% CI 0.67 to 0.81) and 0.48 (95% CI 0.38 to 0.57), respectively. A total of 10 studies reported data on the accuracy of DMSA in detecting high-grade VUR. The summary sensitivity and specificity estimates were 0.93 (95% CI 0.77 to 0.98) and 0.44 (95% CI 0.33 to 0.56), respectively. AUTHORS' CONCLUSIONS Neither the renal ultrasound nor the DMSA scan is accurate enough to detect VUR (of all grades). Although a child with a negative DMSA test has an < 1% probability of having high-grade VUR, performing a screening DMSA will result in a large number of children falsely labelled as being at risk for high-grade VUR. Accordingly, the usefulness of the DMSA as a screening test for high-grade VUR should be questioned.
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Affiliation(s)
- Nader Shaikh
- Children's Hospital of PittsburghGeneral Academic Pediatrics3414 Fifth Ave, Suite 301PittsburghPAUSA15213
| | - Russell B Spingarn
- University of Pittsburgh School of Medicine3550 Terrace StreetPittsburghPAUSA15261
| | - Stephanie W Hum
- Children's Hospital of PittsburghGeneral Academic Pediatrics3414 Fifth Ave, Suite 301PittsburghPAUSA15213
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O'Reilly SE, Plyku D, Sgouros G, Fahey FH, Ted Treves S, Frey EC, Bolch WE. A risk index for pediatric patients undergoing diagnostic imaging with (99m)Tc-dimercaptosuccinic acid that accounts for body habitus. Phys Med Biol 2016; 61:2319-32. [PMID: 26930549 PMCID: PMC5736793 DOI: 10.1088/0031-9155/61/6/2319] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Published guidelines for administered activity to pediatric patients undergoing diagnostic nuclear medicine imaging are currently obtained through expert consensus of the minimum values as a function of body weight as required to yield diagnostic quality images. We have previously shown that consideration of body habitus is also important in obtaining diagnostic quality images at the lowest administered activity. The objective of this study was to create a series of computational phantoms that realistically portray the anatomy of the pediatric patient population which can be used to develop and validate techniques to minimize radiation dose while maintaining adequate image quality. To achieve this objective, we have defined an imaging risk index that may be used in future studies to develop pediatric patient dosing guidelines. A population of 48 hybrid phantoms consisting of non-uniform B-spline surfaces and polygon meshes was generated. The representative ages included the newborn, 1 year, 5 year, 10 year and 15 year male and female. For each age, the phantoms were modeled at their 10th, 50th, and 90th height percentile each at a constant 50th weight percentile. To test the impact of kidney size, the newborn phantoms were modeled with the following three kidney volumes: -15%, average, and +15%. To illustrate the impact of different morphologies on dose optimization, we calculated the effective dose for each phantom using weight-based (99m)Tc-DMSA activity administration. For a given patient weight, body habitus had a considerable effect on effective dose. Substantial variations were observed in the risk index between the 10th and 90th percentile height phantoms from the 50th percentile phantoms for a given age, with the greatest difference being 18%. There was a dependence found between kidney size and risk of radiation induced kidney cancer, with the highest risk indices observed in newborns with the smallest kidneys. Overall, the phantoms and techniques in this study can be used to provide data to refine dosing guidelines for pediatric nuclear imaging studies while taking into account the effects on both radiation dose and image quality.
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Affiliation(s)
- Shannon E O'Reilly
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, FL 32611, USA
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14
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Diagnostic accuracy of Tc-99m DMSA scintigraphy and renal ultrasonography for detecting renal scarring and relative function in patients with spinal dysraphism. Neurourol Urodyn 2014; 34:513-8. [DOI: 10.1002/nau.22608] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2014] [Accepted: 03/13/2014] [Indexed: 01/07/2023]
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Cerwinka WH, Grattan-Smith JD, Jones RA, Haber M, Little SB, Blews DE, Williams JP, Kirsch AJ. Comparison of magnetic resonance urography to dimercaptosuccinic acid scan for the identification of renal parenchyma defects in children with vesicoureteral reflux. J Pediatr Urol 2014; 10:344-51. [PMID: 24128878 DOI: 10.1016/j.jpurol.2013.09.016] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/22/2012] [Accepted: 09/13/2013] [Indexed: 10/26/2022]
Abstract
OBJECTIVE The objective of this study was to compare the accuracy of dimercaptosuccinic acid (DMSA) renal scan to magnetic resonance urography (MRU) in the identification of renal parenchyma defects (RPD). MATERIALS AND METHODS Twenty-five children with history of acute pyelonephritis and vesicoureteral reflux underwent DMSA scan and MRU to determine the presence of RPD. DMSA scans and MRUs were each evaluated by two radiologists and agreement achieved by consensus. Discordant DMSA-MRU findings were re-evaluated in a side-by-side comparison and an ultimate consensus reached. RESULTS The ultimate consensus diagnosis was 18 kidneys with RPDs in 15 patients, of which five were classified as mild RPDs, six as moderate RPDs, and seven as severe RPDs. Although DMSA scan and MRU were similar in their ability to diagnose RPDs, MRU was considered to represent the true diagnosis in 11 of the 12 discordant cases in consensus review by four pediatric radiologists. MRU showed a much higher inter-observer agreement with a weighted kappa of 0.96 for both kidneys compared to 0.71 for the right kidney and 0.86 for the left kidney by DMSA scan. CONCLUSIONS Our results suggest that MRU is superior to DMSA scan in the identification of renal parenchyma defects.
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Affiliation(s)
- W H Cerwinka
- Department of Pediatric Urology, Children's Healthcare of Atlanta, Emory University School of Medicine, Atlanta, GA 30342, USA.
| | - J D Grattan-Smith
- Department of Pediatric Radiology, Children's Healthcare of Atlanta, Atlanta, GA 30342, USA
| | - R A Jones
- Department of Pediatric Radiology, Children's Healthcare of Atlanta, Atlanta, GA 30342, USA
| | - M Haber
- Department of Biostatistics and Bioinformatics, Rollins School of Public Health, Emory University, Atlanta, GA 30322, USA
| | - S B Little
- Department of Pediatric Radiology, Children's Healthcare of Atlanta, Atlanta, GA 30342, USA
| | - D E Blews
- Department of Pediatric Radiology, Children's Healthcare of Atlanta, Atlanta, GA 30342, USA
| | - J P Williams
- Department of Pediatric Radiology, Children's Healthcare of Atlanta, Atlanta, GA 30342, USA
| | - A J Kirsch
- Department of Pediatric Urology, Children's Healthcare of Atlanta, Emory University School of Medicine, Atlanta, GA 30342, USA
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Ghasemi K, Montazeri S, Pashazadeh AM, Javadi H, Assadi M. Correlation of 99mTc-DMSA scan with radiological and laboratory examinations in childhood acute pyelonephritis: a time-series study. Int Urol Nephrol 2013; 45:925-32. [DOI: 10.1007/s11255-013-0479-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2013] [Accepted: 05/24/2013] [Indexed: 12/12/2022]
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Ki HC, Kim SO, Yoo DH, Hwang IS, Hwang EC, Oh KJ, Jung SI, Kang TW, Kwon D, Park K, Ryu SB. Abnormal dimercaptosuccinic Acid scan may be related to persistence of vesicoureteral reflux in children with febrile urinary tract infection. Korean J Urol 2012; 53:716-20. [PMID: 23136633 PMCID: PMC3490093 DOI: 10.4111/kju.2012.53.10.716] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2012] [Accepted: 08/09/2012] [Indexed: 11/18/2022] Open
Abstract
PURPOSE This study assessed whether (99m)technetium dimercaptosuccinic acid (DMSA) scintigraphy used for the assessment of renal sequelae after febrile urinary tract infection (UTI) has any prognostic value for outcome measurement of vesicoureteral reflux (VUR) by retrospectively evaluating the correlation between abnormal DMSA scintigraphy results and persistence of VUR in children with febrile UTI. MATERIALS AND METHODS The medical records of 142 children (57 boys, 85 girls) admitted with febrile UTI from January 2004 to December 2006 and who were followed up for more than 1 year were retrospectively reviewed. At the initial and follow-up visits, renal ultrasound and DMSA scans were performed within 7 days from the diagnosis and voiding cystourethrography (VCUG) was performed within 1 month in all case and follow-up evaluations. RESULTS The children's mean age was 4.8±3.6 years (range, 0.3 to 14 years). The mean follow-up was 28.2±4.8 months. At the initial examination, VUR was more often associated with an abnormal DMSA scan result (83.3%) than with a normal DMSA scan result (16.7%, p=0.02). The frequency of VUR with an abnormal DMSA scan during acute UTI was significantly higher than the frequency of VUR with a normal DMSA scan (38.8% vs, 25.8%, respectively, p=0.004). Also, high-grade VUR was associated with an abnormal DMSA scan result (32.5%) more often than with a normal DMSA scan result (0%, p=0.01). Children with an abnormal DMSA scan had a lower resolution rate of VUR (17.5%) than did children with a normal DMSA scan (75.0%) at the follow-up VCUG (p=0.02). CONCLUSIONS An abnormal result on a DMSA scan during febrile UTI is associated with high-grade and persistent VUR. DMSA scans performed during febrile UTI are useful in reflux resolution in childhood.
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Affiliation(s)
- Hyun Chong Ki
- Department of Urology, Chonnam National University Medical School, Gwangju, Korea
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Staník R, Světlík J, Benkovský I. DMSA and its complexes with radioisotopes: review. J Radioanal Nucl Chem 2012. [DOI: 10.1007/s10967-012-1743-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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20
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Wang B, Sommer G, Spielman D, Shortliffe LMD. Evaluation of dynamic contrast-enhanced MRI in detecting renal scarring in a rat injury model. J Magn Reson Imaging 2010; 31:1132-6. [PMID: 20432348 DOI: 10.1002/jmri.22027] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
PURPOSE To create a reliable rat model with small renal cortical scars and evaluate the accuracy and sensitivity of dynamic contrast-enhanced MRI in detecting the kinds of lesions that are associated with reflux nephropathy. MATERIALS AND METHODS In 16 rats, three unilateral renal cortical lesions were created using either electrocautery or pure alcohol with the contralateral kidney serving as control. MRI on a 1.5 Tesla GE Signa was performed 10-14 days after surgery. After bolus injection of 0.2 mM/Kg Gd-DTPA, sequential MRI acquisitions were performed using a 4-inch quadrature birdcage coil. Renal and scar volumes and pathology were compared after scanning and killing. RESULTS Of the 48 points of injury, 40 (83%) in the 16 rats were detected grossly. Under microscopy, 36 injuries (75%) were detected on mid-kidney cross-sections. The average lesion was 4.2 mm(3) corresponding to 0.5% of the kidney volume. Using pathological findings as the gold standard, the sensitivity and specificity of scar detection using MRI was 69% and 93%, respectively. CONCLUSION A rat model was created to demonstrate the sensitivity of dynamic contrast-enhanced MRI for detecting renal scars. Alcohol and electrocautery created reliable renal scars that were confirmed pathologically. MRI detected these lesions that averaged 4.2 mm(3) (0.5% total renal volume) with sensitivity and specificity of 69% and 93%, respectively.
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Affiliation(s)
- Bingyin Wang
- Department of Urology, Stanford University School of Medicine, Stanford, California, USA
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Urinary Tract Infections in Children: Recommendations for Antibiotic Prophylaxis and Evaluation. An Evidence-Based Approach. Curr Urol Rep 2010; 11:98-108. [DOI: 10.1007/s11934-010-0095-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Zaffanello M, Cataldi L, Brugnara M, Franchini M, Bruno C, Fanos V. Hidden high-grade vesicoureteral reflux is the main risk factor for chronic renal damage in children under the age of two years with first urinary tract infection. ACTA ACUST UNITED AC 2009; 43:494-500. [DOI: 10.3109/00365590903286663] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Marco Zaffanello
- Department of Mother–Child and Biology–Genetics, University of Verona, Verona, Italy
| | - Luigi Cataldi
- Division of Neonatology, Catholic University of Sacred Heart, Rome, Italy
| | - Milena Brugnara
- Department of Mother–Child and Biology–Genetics, University of Verona, Verona, Italy
| | - Massimo Franchini
- Immunohematology and Transfusion Center, Department of Pathology and Laboratory Medicine, University Hospital of Parma, Parma, Italy
| | - Costanza Bruno
- Department of Morphological–Biomedical Science, University of Verona, Verona, Italy
| | - Vassilios Fanos
- Neonatal Intensive Care Unit, University of Cagliari, Cagliari, Italy
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Kotoula A, Gardikis S, Tsalkidis A, Mantadakis E, Zissimopoulos A, Kambouri K, Deftereos S, Tripsianis G, Manolas K, Chatzimichael A, Vaos G. Procalcitonin for the early prediction of renal parenchymal involvement in children with UTI: preliminary results. Int Urol Nephrol 2008; 41:393-9. [PMID: 18836845 DOI: 10.1007/s11255-008-9472-2] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2008] [Accepted: 08/27/2008] [Indexed: 11/25/2022]
Abstract
In order to establish the most reliable marker for distinguishing urinary tract infections (UTI) with and without renal parenchymal involvement (RPI), we recorded the clinical features and admission leukocyte count, erythrocyte sedimentation rate (ESR), C-reactive protein (CRP), and serum procalcitonin (PCT) in 57 children (including 43 girls) aged 2-108 months admitted with a first episode of UTI. RPI was evaluated by Tc-99m dimercaptosuccinic acid (DMSA) scintigraphy within 7 days of admission. To establish cut-off points for ESR, CRP, and PCT, we used receiver operating characteristics curves and compared the area under the curve for ESR, CRP, and PCT. Twenty-seven children were diagnosed as having RPI based on positive renal scintigraphy. A body temperature of >38 degrees C, a history of diarrhea, and poor oral intake were more common in patients with RPI. ESR, CRP, and PCT, but not leukocyte count, were significantly higher in patients with RPI (P < 0.001). PCT was more sensitive and specific for the diagnosis of upper versus lower UTI than ESR and CRP. Using a cut-off value of 0.85 ng/ml, PCT had the best performance, with sensitivity, specificity, and positive and negative predictive values of 89%, 97%, 96%, and 91% respectively. Serum PCT is a better marker than ESR, CRP, and leukocyte count for the early prediction of RPI in children with a first episode of UTI.
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Affiliation(s)
- Aggeliki Kotoula
- Department of Pediatrics, Alexandroupolis University Hospital, Democritus University of Thrace School of Medicine, 68100 Alexandroupolis, Greece
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Abnormal renal scans and decreased early resolution of low grade vesicoureteral reflux. J Urol 2008; 180:1643-7; discussion 1647. [PMID: 18715588 DOI: 10.1016/j.juro.2008.03.102] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2007] [Indexed: 11/22/2022]
Abstract
PURPOSE Limited studies suggest a relationship between scarring on renal scan and failure to resolve vesicoureteral reflux. We evaluated the impact of abnormal renal scans on early vesicoureteral reflux resolution. MATERIALS AND METHODS The medical records and renal scans were reviewed of children diagnosed with primary reflux between 1988 and 2004. We defined an abnormal renal scan as renal scarring or relative renal function 40% or less. Reflux resolution was noted 1 and 2 years after diagnosis. RESULTS Renal scan data were available on 161 children with vesicoureteral reflux, including 127 girls and 34 boys. Relative renal function was 15% or less in 7 children, 16% to 35% in 14, 36% to 40% in 18 and greater than 40% in 122. Of the 161 patients 79 (43%) had an abnormal renal scan, including 37% with grades 1 to 3 reflux. The rate of 2-year reflux resolution in the abnormal and normal renal scan groups was 13% vs 53%. Of children with grades II and III reflux those with an abnormal renal scan were less likely to have reflux resolution compared to those with normal renal scans (23% vs 55% and 4% vs 41, respectively, p <0.05). The same relationship was present at 1 year for grades 2 and 3 (18% vs 49% and 4% vs 30, respectively, p <0.05). CONCLUSIONS Abnormal renal scans are an important independent predictor of early failure to resolve vesicoureteral reflux. An abnormal renal scan should be considered when counseling families about the likelihood of early reflux resolution. Performing a renal scan may be indicated in select patients.
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The relationship between urinary tract infections and vesicoureteral reflux in Turkish children. Int Urol Nephrol 2008; 41:947-51. [DOI: 10.1007/s11255-008-9420-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2007] [Accepted: 06/23/2008] [Indexed: 12/29/2022]
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Dimercaptosuccinic acid (DMSA) renal scan in the evaluation of hypertension in children. Pediatr Nephrol 2008; 23:435-8. [PMID: 18026997 DOI: 10.1007/s00467-007-0656-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/15/2007] [Revised: 09/11/2007] [Accepted: 09/12/2007] [Indexed: 10/22/2022]
Abstract
Renal scarring is known to be associated with hypertension. The primary objective of this study was to investigate the prevalence of renal scarring in children referred to our clinic with hypertension. The secondary objective was to compare renal ultrasound (US) examination with dimercaptosuccinic acid (DMSA) renal scan in diagnosing renal scars in these patients. The study included 159 patients who underwent DMSA renal scan as well as renal US for the evaluation of hypertension of unknown etiology. Thirty-three (21%) patients were found to have renal scars; their demographic details, including mean age and gender distribution, were not significantly different from those without renal scars. In comparison with the DMSA renal scan, sensitivity and specificity of renal US in diagnosing renal scars were 36% and 94%, respectively. In our study, in which the prevalence of scarring was 21%, this gave positive predictive and negative predictive values of 63% and 85%, respectively. In conclusion, our study indicates that renal scarring is present in 21% of otherwise healthy children who are evaluated for newly diagnosed hypertension, and renal US is not a sensitive imaging modality to rule out renal scarring.
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Ochoa Sangrador C, Formigo Rodríguez E. Pruebas diagnósticas de imagen recomendadas en la infección urinaria. An Pediatr (Barc) 2007; 67:498-516. [DOI: 10.1016/s1695-4033(07)70717-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Bibliography. Current world literature. Female urology. Curr Opin Urol 2007; 17:287-90. [PMID: 17558274 DOI: 10.1097/mou.0b013e3281fbd54d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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