Appropriate excision surgery reduces intrahepatic bile duct dilatation in pediatric patients with congenital biliary dilatation.

This study aims to assess the long-term postoperative changes in the preoperative dilated intrahepatic bile duct (IHBD) in pediatric patients with congenital biliary dilatation (CBD). The postoperative serial changes in the preoperative dilated left IHBD in pediatric patients who underwent appropriate excision surgery were evaluated using magnetic resonance cholangiopancreatography (MRCP). The IHBD dilation significantly decreased at a median of 1.