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Neonatal Ultrasound for Anorectal Malformations in Male Newborns Without Perineal Fistula: A Good Diagnostic Tool for A Safe One-Staged Surgery

Author(s): Carlos Giné, Ana Coma, Laura García, Ana Laín, Ignasi Barber, Rodrigo Maluje, Manuel López

Background/Purpose: The standard neonatal approach for a male newborn with an anorectal malformation (ARM) and no perineal fistula remains the opening of a diverting colostomy. Here we describe radiological improvements in neonatal ultrasound (US) that characterize the recto-urinary fistula and allow a direct anorectal reconstruction.

Material and Methods: This is a descriptive report of radiological findings in neonatal ultrasound in all newborn male patients with an ARM, no perineal fistula and no colostomy, recruited over a 6-year period. A paediatric radiologist actively looked for recto-urinary fistulas and their relation to anatomical landmarks. These findings, along with the clinical status and associated anomalies, were considered to indicate a single-staged procedure.

Results: From 28 neonates with ARM only three met the inclusion criteria. The first 2 cases showed a bulbar and prostatic fistula in US but with associated malformations and benefited from a colostomy. The third baby presented a bulbar fistula in the US, normal sacrum and no lifethreatening malformations and benefited from a singlestaged procedure.

Conclusions: Neonatal perineal US can give the same anatomical information than the distal colostogram and leads to a safe single-staged procedure in expert teams, if there is a lack of associated life-threatening malformations.

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