title: Retrospective analysis of sequential changes in serum intact parathyroid hormone levels during conventional parathyroid exploration.
abstract: BACKGROUND
  The purpose of this study was to assess sequential changes in serum parathyroid hormone (PTH) levels during conventional parathyroidectomy.
  
  
  METHODS
  Sera were collected before and 10 minutes after resection of each parathyroid tumor from 112 consecutive patients and assayed postoperatively within 48 hours for PTH.
  
  
  RESULTS
  PTH reductions corroborated cures for 94 of 112 cases (84%), including 70 of 71 patients with solitary adenomas (SAs). However, there were 15 false positives (13%), in which PTH decreased more than 50% within 10 minutes of resection of 1 parathyroid tumor while additional parathyroid tumors remained in situ (1 of 71 SAs, 4 of 6 double adenomas, 7 of 15 primary hyperplasias, and 3 of 17 tertiary hyperplasias). There were 3 false negatives (3%), with PTH unchanged, even though postoperative PTH and calcium values confirmed cure (1 SA, 1 primary hyperplasia, and 1 tertiary hyperplasia). There were only 2 of 112 failed explorations (1.8%), which would not have been avoided by PTH monitoring because both subsequently were found to have mediastinal parathyroid adenomas.
  
  
  CONCLUSIONS
  We conclude that intraoperative PTH changes corroborated outcome in SA but may under-estimate the extent of resection required in parathyroid hyperplasia.
authors.affiliation: Department of Surgery, Emory University School of Medicine, Atlanta, Ga. 30322, USA.
authors.forename: C J
authors.initials: CJ
authors.lastname: Weber
authors.forename: J C
authors.initials: JC
authors.lastname: Ritchie
mesh_terms: D000236:Adenoma / Q000097:blood / Q000601:surgery; D000328:Adult; D000368:Aged; D002624:Chemistry, Clinical / Q000592:standards; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D006961:Hyperparathyroidism / Q000097:blood* / Q000601:surgery*; D006965:Hyperplasia; D007432:Intraoperative Period; D008297:Male; D008875:Middle Aged; D010281:Parathyroid Hormone / Q000097:blood*; D010282:Parathyroid Neoplasms / Q000097:blood / Q000601:surgery; D016105:Parathyroidectomy; D011237:Predictive Value of Tests; D015203:Reproducibility of Results; D012189:Retrospective Studies; D016896:Treatment Outcome
chemical_list: D010281:Parathyroid Hormone