title: Usefulness of nonbreath-hold 1-shot magnetic resonance cholangiopancreatography for the evaluation of choledochal cyst in children.
abstract: OBJECTIVE
  The aim of this study was to clarify the usefulness of magnetic resonance cholangiopancreatography (MRCP) for the evaluation of choledochal cyst in children.
  
  
  METHODS
  MRCP was performed preoperatively in 33 patients. The MRCP findings were compared with those of endoscopic retrograde cholangiopancreatography or intraoperative cholangiopancreatography.
  
  
  RESULTS
  In all 33 patients, MRCP could detect choledochal cyst. The detection rate of a cyst in the main pancreatic duct was 62.2%, of abnormal union of the pancreaticobiliary junction (AUPBJ) was 53.3%, of dilatation or abnormalities of the main pancreatic duct was 75.0% and of a protein plug or stone was 76.9%. In patients under 2 years of age (group A), these findings were significantly lower than those of patients above 2 years of age (group B) [main pancreatic duct: 16.6% (1/6) vs 73.1% (19/26), P < 0.01; AUPBJ: 0.0% (0/6) vs 66.7% (16/24), P < 0.05; and protein plug or stone: 0.0% (0/2) vs 90.9% (10/11), P < 0.05]. The detection rate of AUPBJ in the patients with fusiform dilatation was superior to that of those with cystic dilatation [70% (14/20) vs 20% (2/10), P < 0.05]. In the patients with fusiform dilatation, the detection rate in group A was significantly lower than that in group B [0.0% (0/3) vs 82.4% (14/17), P < 0.01]; however, there was no significant difference between the 2 groups in the detection of cystic dilatation.
  
  
  CONCLUSIONS
  In patients older than 2 years, MRCP should be the first-choice method for confirming the diagnosis and for ensuring accurate visualization of the pancreaticobiliary system.
authors.affiliation: Department of Pediatrics, Juntendo University School of Medicine, Tokyo, Japan. f-mitsuo@zc5.so-netne.jp
authors.forename: Mitsuyoshi
authors.initials: M
authors.lastname: Suzuki
authors.forename: Toshiaki
authors.initials: T
authors.lastname: Shimizu
authors.forename: Takahiro
authors.initials: T
authors.lastname: Kudo
authors.forename: Ryuyo
authors.initials: R
authors.lastname: Suzuki
authors.forename: Yoshikazu
authors.initials: Y
authors.lastname: Ohtsuka
authors.forename: Yuichiro
authors.initials: Y
authors.lastname: Yamashiro
authors.forename: Akihiko
authors.initials: A
authors.lastname: Shimotakahara
authors.forename: Atsuyuki
authors.initials: A
authors.lastname: Yamataka
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D002758:Cholangiography; D002760:Cholangiopancreatography, Endoscopic Retrograde; D049448:Cholangiopancreatography, Magnetic Resonance; D015529:Choledochal Cyst / Q000175:diagnosis*; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography