VAI TRÒ CỦA CỘNG HƯỞNG TỪ TRONG CHẨN ĐOÁN NANG ỐNG MẬT CHỦ Ở TRẺ EM

Abstract

Objective: Description the imaging characteristics of choledochal cyst on Magnetic Resonance Imaging (MRI). Determination the merits of MRI in diagnosing choledochal cysts in children. Methods: 43 patients were diagnosed choledochal cyst postoperative and had Ultrasound and Magnetic Resonance Cholangiopancreatography (MRCP) from 1 January 2020 to 30 July 2022 in City Children’s Hospital. MRI results were compared with intraoperative findings. Methods: Retrospective series of cases. Results: In 43 patients choledochal cyst including 32 girls and 11 boys: Mean age of 54,5 ± 42,7 months (1 months – 14 years). Female/male=2,9/1. The most common clinical symptoms were abdominal pain 79,1% and vomiting 53,5%. Choledochal cyst on MRI: The type of choledochal cysts (according to Todani): only type I (79,1%) (20,9%) and type  IV. Type of dilatation: cystic dilatation (81,4%), fusiform dilatation (18,6%); Mean measurement: 34,8 ± 25,8mm; Stone in cyst (37,2%); intrahepatoc duct dilatation (39,5%). On MRI, there are 7 cases (16,3%) anomalous pancreaticobiliary junction (APBJ), 5 cases (11,6%) hepatic duct stenosis and 3 cases (7%) anatomic variants of the biliary tree. The sensitivity, specificity was 100%; 87,8% in diagnosing APBJ, 100%; 97,4% in diagnosing hepatic duct stenosis and 100%, 100% in diagnosing anatomic variants of the biliary tree. Conclusion: MRCP has a high value in detecting APBJ, diagnosing hepatic duct stenosis and anatomic variants of the biliary tree. Pre-operative MRI should be performed in all of pediatric choledochal cysts patients.