title: Clinical characteristics of pancreatic neuroendocrine tumors in Japanese patients with von Hippel-Lindau disease.
abstract: OBJECTIVE
  The aim of this study was to elucidate the clinical characteristics of pancreatic neuroendocrine tumors (NET) in Japanese patients with von Hippel-Lindau (VHL) disease.
  
  
  METHODS
  We sent a questionnaire to all members of the Japan Pancreas Society in 2002 asking for the number of patients with VHL and complications of NET and/or cystic lesion in the pancreas. Furthermore, we sent a second questionnaire to obtain detailed information about the clinical characteristics of pancreatic NET.
  
  
  RESULTS
  A total of 58 patients with VHL were reported. Among these, 34 (59%) patients had pancreatic lesions, including 10 with pancreatic NET, 23 with a cystic lesion, and one with both. The mean age at identification of pancreatic NET was 34.6 years (range, 22-64 years). The mean diameter of the tumors was 4.3 cm (range, 1-12.5 cm). Distant metastases were found in 2 (20%) cases. During the follow-up period (3.3 years; range, 0-8 years), 7 patients are alive, and 2 patients died of hemangioblastomas.
  
  
  CONCLUSIONS
  Pancreatic NET in the VHL disease showed a relatively lower incidence of metastasis compared with sporadic non-functioning pancreatic NET, yielding a favorable prognosis. Because they present no hormonal syndrome, periodic screening examinations are warranted to identify pancreatic NET at an early stage.
authors.affiliation: Department of Urology, Kochi Medical School, Kochi, Japan.
authors.forename: Ichiro
authors.initials: I
authors.lastname: Yamasaki
authors.forename: Isao
authors.initials: I
authors.lastname: Nishimori
authors.forename: Shingo
authors.initials: S
authors.lastname: Ashida
authors.forename: Takuhiro
authors.initials: T
authors.lastname: Kohsaki
authors.forename: Saburo
authors.initials: S
authors.lastname: Onishi
authors.forename: Taro
authors.initials: T
authors.lastname: Shuin
mesh_terms: D000328:Adult; D018278:Carcinoma, Neuroendocrine / Q000401:mortality / Q000473:pathology* / Q000601:surgery; D005260:Female; D006306:Health Surveys; D006801:Humans; D007564:Japan; D008113:Liver Neoplasms / Q000556:secondary*; D008207:Lymphatic Metastasis; D008297:Male; D008875:Middle Aged; D010190:Pancreatic Neoplasms / Q000401:mortality / Q000473:pathology* / Q000601:surgery; D011379:Prognosis; D011795:Surveys and Questionnaires; D006623:von Hippel-Lindau Disease / Q000401:mortality / Q000473:pathology* / Q000601:surgery