title: Parathyroid hormone venous sampling prior to reoperation for primary hyperparathyroidism.
abstract: BACKGROUND
  The surgical cure rate for primary hyperparathyroidismis greater than 95%. For those who have recurrent or persistent disease, preoperative localization improves reoperation success rates. Selective parathyroid venous sampling (SPVS) for intact parathyroid hormone is particularly useful when non-invasive localization techniques are negative or inconclusive.
  
  
  METHODS
  We present all known cases (n = 13)between 1994 and 2002 who had venous sampling for localization a tour institution prior to reoperation for recurrent or persistent primary hyperparathyroidism. Comparison was made with non-invasive localization procedures. Results of invasive and non-invasive localization were correlated with surgical findings.
  
  
  RESULTS
  Of the nine reoperated cases, eight had positive correlations between SPVS and operative findings and histopathology. SPVS did not reveal the parathyroid hormone source in one case with negative non-invasive localization procedures. Comparisons between SPVS,computerized tomography (CT), and parathyroid scintigraphy (MIBI)as expressed in terms of true positive (TP), false positive (FP)and false negative (FN) were: SPVS - TP88.8%, FP 0%, FN 11.1%; CT - TP22.2%, FP 22.2%, FN 55.5%; and MIBI - TP33.3%, FP 0%, FN 66.6%. At least seven of the nine operated cases have been cured; another remained normocalcaemic 2 weeks after subtotal parathyroidectomy.
  
  
  CONCLUSIONS
  In our institution SPVS has proven to be a valuable tool in cases with recurrent or persistent primary hyperparathyroidism and negative non-invasive localization procedures.
authors.affiliation: Department of Diabetes and Endocrinology, University of Queensland,The Princess Alexandra Hospital, Woolloongabba, Queensland, Australia. estella@medstv.unimelb.edu.au
authors.forename: E
authors.initials: E
authors.lastname: Estella
authors.forename: M S Z
authors.initials: MS
authors.lastname: Leong
authors.forename: I
authors.initials: I
authors.lastname: Bennett
authors.forename: L
authors.initials: L
authors.lastname: Hartley
authors.forename: N
authors.initials: N
authors.lastname: Wetzig
authors.forename: C A
authors.initials: CA
authors.lastname: Archibald
authors.forename: J S
authors.initials: JS
authors.lastname: Harper
authors.forename: R C
authors.initials: RC
authors.lastname: Cuneo
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D006961:Hyperparathyroidism / Q000097:blood / Q000175:diagnosis / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D010280:Parathyroid Glands / Q000098:blood supply; D010281:Parathyroid Hormone / Q000097:blood*; D016105:Parathyroidectomy; D012008:Recurrence; D012086:Reoperation; D012189:Retrospective Studies; D014680:Veins
chemical_list: D010281:Parathyroid Hormone