title: Endoscopic retrograde cholangiopancreatography in evaluation of choledochal dilatation in patients with obstructive jaundice.
abstract: OBJECTIVE
  To determine the causes of choledochal dilatation in patients with obstructive jaundice.
  
  
  METHODS
  One hundred and sixty-four patients with obstructive jaundice were investigated by endoscopic retrograde cholangiopancreatography(ERCP), and patients with choledochal dilatation (group I, n=110) were compared with those without choledochal dilatation (group II, n=54).
  
  
  RESULTS
  The causes of common bile duct dilatation were choledocholith, juxtapapillary duodenal diverticula and congenital dilatation of the common bile duct. The distal common bile duct and its surroundings were abnormal in 104 (94.55%) of the 110 patients and in 13 (24.08%) of the 54 patients (P<0.01). Juxtapapillary duodenal diverticulum accounted for 24.55% in group I, and only in 9.26% in group II (P<0.05). Post-cholecystectomy patients were 13.64% in group I, and only 5.56% in group II.
  
  
  CONCLUSIONS
  The abnormalities of the distal common bile duct and its surroundings can usually be detected as underlying causes of common bile duct dilatation. ERCP is necessary before cholecystectomy, since it is considered the "gold standard" for the diagnosis of distal common bile duct abnormalities.
authors: Department of Gastroenterology, First Affilliated Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China. weixing121@sina.com
authors: Wei-Xing
authors: WX
authors: Chen
authors: Yu
authors: Y
authors: Zhang
authors: You-Ming
authors: YM
authors: Li
authors: Guo-Qiang
authors: GQ
authors: Xu
authors: Ying
authors: Y
authors: Fang
authors: Shu-Ping
authors: SP
authors: Cai
mesh_terms: D000328:Adult; D000368:Aged; D001649:Bile Duct Diseases / Q000453:epidemiology / Q000473:pathology*; D002760:Cholangiopancreatography, Endoscopic Retrograde; D003135:Common Bile Duct / Q000473:pathology*; D005260:Female; D006801:Humans; D015994:Incidence; D041781:Jaundice, Obstructive / Q000453:epidemiology / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies