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  • Title: Clinical urologic and urodynamic outcomes in patients with anorectal malformation and absent vagina after vaginal replacement.
    Author: Ahmed H, Almomani M, Strine AC, Reddy PP, Sheldon C, Frischer J, Breech L, Minevich E, Noh PH, VanderBrink BA.
    Journal: J Pediatr Surg; 2020 Sep; 55(9):1834-1838. PubMed ID: 32087935.
    Abstract:
    INTRODUCTION AND OBJECTIVES: Anorectal malformations (ARMs) represent a complex spectrum of anorectal and genitourinary anomalies and a paucity of evidence is available on long-term urologic outcomes in all ARM subtypes. It was our subjective bias from being a referral center for ARM patients that the subtype of rectovestibular fistula and absent vagina had higher risk of renal and bladder abnormalities than typical rectovestibular fistula patients. Therefore, to confirm or refute our clinical suspicions, the purpose of this study was to review this specific cohort of ARM patients and describe both the clinical urological and urodynamic outcomes. METHODS: A retrospective cohort study was performed for 120 patients who were treated for ARM and vaginal replacement at our institution between 1991 and 2017. Fifteen patients with rectovestibular fistula and absent vagina were included in our review. Demographic and clinical data were abstracted from their medical records, including urodynamic findings, need for clean intermittent catheterization (CIC), urinary continence, and renal function. RESULTS: Vaginal replacement surgery was undertaken concomitantly with ARM repair in 10 of the 15 patients (67%). One patient was lost to follow up, and mean follow up postoperatively was 39 months. In all but one patient, rectum or colon was used as the substrate for vaginal replacement. Of the 15 patients, 13 had continence data available. A total of 10 patients (77%) were able to achieve social continence. Overall six patients used CIC to manage their bladder and 40% of continent patients used CIC. Urinary continence outcomes in patients who had partial vaginal replacement compared to those with total vaginal replacement did not reveal a clinically significant difference. Continence was achieved in 3/4 patients (75%) with a history of tethered cord compared to 7/9 patients (78%) without a history of tethered cord release. Urodynamics were performed postoperatively in 7 of the 157 patients (47%). Uninhibited detrusor contractions (UDCs) were present in 3 out of 7 patients, and a cystometric capacity greater than expected was noted in 4 patients. Additionally, 2 patients had end filling detrusor pressure greater than 40 cm H2O. GFR data were available for 13 of the 15 patients and (85%) were classified as chronic kidney disease (CKD) stage I or not having any significant loss of renal function. CONCLUSIONS: In this cohort of rectovestibular fistula and absent vagina, 77% reported achieving urinary continence. However CIC was employed in 40% of the patients which is higher than prior published noncloaca female ARM patient population. Urodynamic abnormalities were noted when performed and led to change in bladder management. Renal function measured with GFR was normal in 85%. Patients with rectovestibular fistula and absent vagina benefit from urologic screening given higher rates of lower urinary tract dysfunction that can require CIC to protect the upper urinary tract and achieve urinary continence. TYPE OF STUDY: Case series. LEVEL OF EVIDENCE: Level IV.
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