title: Primary lymph node gastrinoma: 2 cases and a review of the literature.
abstract: BACKGROUND
  Gastrinoma is a rare tumour of the diffuse neuroendocrine system with the primary invariability located within the duodenum or pancreas. Numerous authors have described gastrinoma apparently isolated to peripancreatic lymph nodes, following exhaustive radiological and operative localisation and examination.
  
  
  METHODS
  Two cases of apparent primary lymph node gastrinoma seen in our institution are presented, along with a literature review including 58 other presented cases.
  
  
  RESULTS
  On prolonged follow-up up to 131 months, 34 patients have remained in remission supporting the diagnosis of primary lymph node gastrinoma. Occult primary disease, usually in the form of microduodenal tumours, have become evident in the remaining 24 cases.
  
  
  CONCLUSIONS
  The existence of primary lymph node gastrinoma is supported by many presented case studies, but long-term follow-up of all patients should occur in the expectation that occult primary disease will become apparent in some.
authors.affiliation: Department of Surgery, Wellington Regional Hospital, Private Bag 7902, Wellington, 6021, New Zealand.
authors.forename: Simon
authors.initials: S
authors.lastname: Harper
authors.forename: Richard W
authors.initials: RW
authors.lastname: Carroll
authors.forename: Andrea
authors.initials: A
authors.lastname: Frilling
authors.forename: Susrutha K
authors.initials: SK
authors.lastname: Wickremesekera
authors.forename: Simon
authors.initials: S
authors.lastname: Bann
mesh_terms: D000368:Aged; D005260:Female; D015408:Gastrinoma / Q000175:diagnosis* / Q000601:surgery; D006801:Humans; D008198:Lymph Nodes / Q000473:pathology*; D008297:Male; D008875:Middle Aged