title: Familial pancreatic cancer.
abstract: BACKGROUND
  Approximately 5% to 10% of individuals with pancreatic cancer report a history of pancreatic cancer in a close family member. In addition, several known genetic syndromes, such as familial breast cancer (BRCA2), the Peutz-Jeghers syndrome, and the familial atypical multiple mole melanoma syndrome, have been shown to be associated with an increased risk of pancreatic cancer. The known genes associated with these conditions can explain only a portion of the clustering of pancreatic cancer in families, and research to identify additional susceptibility genes is ongoing.
  
  
  OBJECTIVE
  To provide an understanding of familial pancreatic cancer and the pathology of familial exocrine pancreatic cancers.
  
  
  METHODS
  Published literature on familial aggregation of pancreatic cancer and familial exocrine pancreatic tumors.
  
  
  CONCLUSIONS
  Even in the absence of predictive genetic testing, the collection of a careful, detailed family history is an important step in the management of all patients with pancreatic cancer. While most pancreatic cancers that arise in patients with a family history are ductal adenocarcinomas, certain subtypes of pancreatic cancer have been associated with familial syndromes. Therefore, the histologic appearance of the pancreatic cancer itself, and/or the presence and appearance of precancerous changes in the pancreas, may increase the clinical index of suspicion for a genetic syndrome.
authors.affiliation: Department of Oncology,The Johns Hopkins School of Medicine, Baltimore, MD 21212, USA.
authors.forename: Chanjuan
authors.initials: C
authors.lastname: Shi
authors.forename: Ralph H
authors.initials: RH
authors.lastname: Hruban
authors.forename: Alison P
authors.initials: AP
authors.lastname: Klein
mesh_terms: D000230:Adenocarcinoma / Q000175:diagnosis / Q000235:genetics* / Q000473:pathology; D020022:Genetic Predisposition to Disease; D006801:Humans; D009375:Neoplasms, Glandular and Epithelial / Q000175:diagnosis / Q000235:genetics* / Q000473:pathology; D010190:Pancreatic Neoplasms / Q000175:diagnosis / Q000235:genetics* / Q000473:pathology; D011379:Prognosis; D013577:Syndrome