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Does the Final Intraoperative PTH Level Really Have to Fall into the Normal Range to Signify Cure?
MedLine Citation:
PMID:  22203183     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
BACKGROUND: Intraoperative parathyroid hormone (IOPTH) helps shorten the duration of surgery and increase the likelihood of surgical cure. Although general consensus agrees that the IOPTH should fall by 50%, there is much debate as to whether the IOPTH needs to fall into the normal range. METHODS: We retrospectively reviewed a prospective database of patients undergoing surgery for treatment of primary hyperparathyroidism. We included all patients with an IOPTH that fell by >50% by 10 or 15 min, but that did not fall into the normal range (parathyroid hormone remained ≥60 pg/ml). We excluded patients who had undergone prior neck surgery or had known multiple endocrine neoplasia 1 or 2. RESULTS: A total of 1,231 patients underwent a parathyroidectomy, 155 of whom met the study's inclusion/exclusion criteria (12.6%). A total of 117 patients had an IOPTH fall by 50% by 10 min, and 38 patients' IOPTH fell by 50% by 15 min. Overall surgical cure rate was 98.7%. One patient from the 10-minute group and one patient from the 15-minute group had persistent disease on follow-up. One patient in the 15-minute group had recurrent disease. With a mean ± SEM 18.1 ± 2.1 months' follow-up, the recurrence rate in this cohort was 0.6%. The average calcium at last follow-up was 9.4 ± 0.0 mg/dl. CONCLUSIONS: Allowing the IOPTH to fall by 50% by 15 min, regardless of whether the IOPTH falls into the normal range, results in a high success rate when performed by experienced surgeons. This helps reduce intraoperative time used waiting for additional parathyroid hormone levels and the risks associated with unnecessary bilateral neck exploration.
Authors:
Alexandra E Reiher; Sarah Schaefer; Herbert Chen; Rebecca S Sippel
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-12-28
Journal Detail:
Title:  Annals of surgical oncology     Volume:  -     ISSN:  1534-4681     ISO Abbreviation:  -     Publication Date:  2011 Dec 
Date Detail:
Created Date:  2011-12-28     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9420840     Medline TA:  Ann Surg Oncol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Division of Endocrinology, Department of Internal Medicine, University of Wisconsin, Madison, WI, USA.
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