title: Biliary tract cancers in Olmsted County, Minnesota, 1976-2008.
abstract: OBJECTIVE
  The epidemiology of biliary tract cancers has changed in the United States in the past several decades. The aim of this study is to evaluate biliary tract cancers with regard to the incidence rates, etiology, treatment, and survival in Olmsted County between 1976 and 2008.
  
  
  METHODS
  Community residents over 20 years of age with a newly diagnosed biliary tract cancers were identified using the Rochester Epidemiology Project. Clinical information, including tumor stage, treatment, and survival status was abstracted from the medical records. The incidence rate was calculated considering the entire population of Olmsted County to be at risk and adjusted by age and sex according to US Census 2000 population. Temporal trends of patient survival with biliary tract cancers were assessed.
  
  
  RESULTS
  A total of 116 subjects met the study criteria. The age-sex-adjusted incidence rate of intrahepatic cholangiocarcinoma (ICC) increased from 0.3 to 2.1 (P=0.02) but one of gall bladder (GB) cancer decreased from 4.0 to 2.2 (P=0.04) per 100,000 person-years between 1976 and 2008 (P<0.01). Overall incidence rates of remaining biliary tract cancers have not changed. Overall 59% of patients presented with stage 3 or 4 cancers and a median survival was 6.3 months. Survival in patients with biliary tract cancer has minimally improved from median survival of 4.2-7.7 months between 1976 and 2008 (P=0.05).
  
  
  CONCLUSIONS
  In Olmsted County, the incidence of ICC and GB cancer has increased and decreased, respectively. The prognosis remains poor in community residents diagnosed with biliary tract cancers.
authors: Division of Gastroenterology and Hepatology, Mayo Clinic College of Medicine, Rochester, Minnesota, USA.
authors: Ju Dong
authors: JD
authors: Yang
authors: Bohyun
authors: B
authors: Kim
authors: Schuyler O
authors: SO
authors: Sanderson
authors: Jennifer St
authors: JS
authors: Sauver
authors: Barbara P
authors: BP
authors: Yawn
authors: Joseph J
authors: JJ
authors: Larson
authors: Terry M
authors: TM
authors: Therneau
authors: Lewis R
authors: LR
authors: Roberts
authors: Gregory J
authors: GJ
authors: Gores
authors: W Ray
authors: WR
authors: Kim
mesh_terms: D000368:Aged; D001650:Bile Duct Neoplasms / Q000453:epidemiology / Q000401:mortality / Q000601:surgery; D001653:Bile Ducts, Intrahepatic; D001661:Biliary Tract Neoplasms / Q000453:epidemiology* / Q000401:mortality / Q000601:surgery; D018281:Cholangiocarcinoma / Q000453:epidemiology / Q000601:surgery; D002763:Cholecystectomy; D005260:Female; D005706:Gallbladder Neoplasms / Q000453:epidemiology / Q000601:surgery; D006801:Humans; D015994:Incidence; D008113:Liver Neoplasms / Q000453:epidemiology / Q000601:surgery; D008297:Male; D008910:Minnesota / Q000453:epidemiology; D011379:Prognosis; D015996:Survival Rate