Objective: Assessment for diagnosis and survey of biliary abnormalities in coordination choledochal cyst (CC) in children with magnetic resonnace cholangiopancreatography (MRCP). Methods: All patients diagnosed with CC, examined preoperative MRCP and laparoscopic cystectomy and Roux-en-Y bilio-enterotomy at No.l Children's Hospital from Sept 2009 to Dee 2011. Biliary findings on MRCP would be compared with findings of intraoperation. Results: There were 85 patients. The types of CC (type IA n= 20
type IB n=2
type IC n=20
type IVA n=39
type IVB n=4) determined on MRCP correlated with that identified on intraoperative findings. The detection rate of the pancreatiobiliary junction was 81.17 percent and abnormal bile-pancreatic junction was 91.13 percent. The sensitivity, specificity and accuracy of MRCP in the diagnosis of cystic type was 100 percent, 100 percent, 100 percent
in the stones were 80 percent, 100 percent and 80.76 percent
in the hepatic duct stricture was 100 percent, 98.33 percent and 96.15 percent
in the anatomic variants were 100 percent,100 percent and 100 percent, respectively. Conclusions: MRCP was accurate and noninvasive diagnostic tool for type of CC. It could be used to detect co-existing biliary anomalies and anatomical variants in CC in children.