Retrospective Cohort Study
Copyright ©The Author(s) 2023. Published by Baishideng Publishing Group Inc. All rights reserved.
World J Clin Cases. Jun 6, 2023; 11(16): 3750-3755
Published online Jun 6, 2023. doi: 10.12998/wjcc.v11.i16.3750
Long term outcomes of Cohen’s cross trigonal reimplantation for primary vesicoureteral reflux in poorly functioning kidney
Mohd Sualeh Ansari, Ravi Banthia, Shrey Jain, Vinay N Kaushik, Nayab Danish, Priyank Yadav
Mohd Sualeh Ansari, Ravi Banthia, Shrey Jain, Vinay N Kaushik, Nayab Danish, Priyank Yadav, Department of Urology and Renal Transplantation, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow 226014, Uttar Pradesh, India
Author contributions: Ansari MS and Yadav P designed the research study; Banthia R, Jain S, and Kaushik VN performed the research; Danish N and Banthia R analyzed the data and wrote the manuscript; Ansari MS and Yadav P edited the manuscript; All authors have read and approve the final manuscript.
Institutional review board statement: The study was reviewed and approved by the Institutional Ethics Committee of Sanjay Gandhi Postgraduate Institute of Medical Sciences (Approval No. 2020-185-IP-EXP-24).
Informed consent statement: This is to inform that consent waiver has been obtained from the Institutional Ethics Committee for the research article.
Conflict-of-interest statement: All the authors declare that there are no conflicts of interest regarding the publication of this study.
Data sharing statement: No additional data are available.
STROBE statement: The authors have read the STROBE Statement – checklist of items, and the manuscript was prepared and revised according to the STROBE Statement – checklist of items.
Open-Access: This article is an open-access article that was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution NonCommercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: https://creativecommons.org/Licenses/by-nc/4.0/
Corresponding author: Priyank Yadav, MCh, Assistant Professor, Department of Urology and Renal Transplantation, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Raebareli Road, Lucknow 226014, Uttar Pradesh, India. priyankmamc@gmail.com
Received: February 15, 2023
Peer-review started: February 15, 2023
First decision: April 11, 2023
Revised: April 19, 2023
Accepted: May 6, 2023
Article in press: May 6, 2023
Published online: June 6, 2023
Processing time: 106 Days and 16 Hours
Abstract
BACKGROUND

Open ureteric reimplantation by cross trigonal technique described by Cohen is considered a common surgical option for correction of vesicoureteral reflux (VUR). There is a lack of evidence in literature though for what happens to such kidneys, in the long run, particularly those which are poorly functioning.

AIM

To assess the long-term outcomes of ureteric reimplantation in poorly functioning kidneys in children with unilateral primary VUR.

METHODS

Children with unilateral primary VUR and a relative renal function of less than 35% who underwent open or laparoscopic ureteric reimplantation between January 2005 and January 2017 were included in the study. Patients who had a follow up of less than five years were excluded. Preoperative evaluation consisted of a voiding cystourethrogram and Dimercaptosuccinic acid (DMSA) scan. In the follow-up period, patients underwent a diuretic scan at 6 weeks and 6 months. Follow up ultrasound was done for change in grade of hydronephrosis and retrovesical ureteric diameter. Subsequent follow up was done at 6 monthly intervals with evaluation for proteinuria and hypertension and any recurrent urinary tract infection (UTI). For assessment of cortical function, DMSA was repeated annually for 5 years after surgery. A paired-samples t-test was used to test the mean difference of DMSA between pre-post observations.

RESULTS

During this period, 36 children underwent ureteric reimplantation for unilateral primary VUR. After excluding those with insufficient follow-up, 31 were included in the analysis. Most of the patients were males (n = 26/31, 83.8%). Patient’s age (mean ± SD, range) was 5.21 ± 3.71, 1-18 years. The grades of VUR were grade II (1 patient), grade III (8 patients), grade IV (10 patients), and grade V (12 patients). The pre and postoperative DMSA was 24.064 ± 12.02 and 24.06 ± 10.93, which was almost the same (statistically equal, paired-samples t-test: P = 0.873). The median (range) follow-up duration was 82 (60-120) mo. One patient had persistent reflux after surgery (preoperative: grade IV, postoperative: grade III), and the very same patient developed recurrent UTI. The difference in the preoperative and postoperative DRF was less than 10% in 29 patients. In one patient, the DRF decreased by 17% (22% to 05%) while in another patient, the DRF increased by 12% (25% to 37%) after surgery. None of the patients had an increase in scarring after surgery. 15% of patients were hypertensive before surgery and all of them continued to be hypertensive after surgery while none developed hypertension after surgery. None of the patients had significant proteinuria (> 150 mg/d) during the follow-up period.

CONCLUSION

Children with unilateral primary VUR and poorly functioning kidney maintain the renal function over the long term in most cases. Hypertension and proteinuria do not progress over time in these patients.

Keywords: Vesicoureteral reflux; Ureteric reimplantation; Relative renal function; Poorly functioning kidney; Unilateral; Long term

Core Tip: This article presents the outcomes of reimplantation of ureters in patients with vesicoureteral reflux in patients without any secondary causes of reflux. In this study, we found that children with unilateral primary vesicoureteral reflux and poorly functioning kidney maintain the renal function over the long term in most cases. All the patients who were hypertensive before surgery continued to be hypertensive after surgery while no patient developed new hypertension after surgery.