title: No recurrence of sporadic primary hyperparathyroidism when cure is established 6 months after parathyroidectomy.
abstract: OBJECTIVE
  Cure rate for primary hyperparathyroidism (PHPT) is reported to be 94-100% 1 year after surgery, but recent data suggest recurrence in 4% of the patients 1-5 years post-operatively. The aim of our study was to establish the cure rate and its maintenance in the long-term after parathyroidectomy (PTx) in patients with sporadic PHPT.
  
  
  METHODS
  Evaluation of recurrence in patients with sporadic hyperparathyroidism who underwent PTx 1-24 years prior to the study.
  
  
  METHODS
  We identified 111 patients who underwent initial PTx between 1984 and 2008, and had no MEN-1, MEN-2, or CaR mutation; parathyroid carcinoma; a history of lithium use; or renal failure. Thirty-eight patients were lost to follow-up or were unwilling or unable to participate in the study. Cure was defined as maintenance of normal serum calcium and parathyroid hormone concentrations 6 months after PTx.
  
  
  RESULTS
  Cure was achieved in 68 of 73 patients studied (93%) and was sustained in all for 6+/-5 years.
  
  
  CONCLUSIONS
  The cure rate of sporadic PHPT after initial surgery is 93%. When cure is achieved, this is sustained in 100% of the patients for up to 24 years post-operatively. Our data suggest that closer early follow-up is advocated in all patients undergoing PTx to definitively establish cure and to provide a safety net for those with residual gland pathology. The data do not support the need for long-term follow-up when cure is established 6 months after PTx.
authors.affiliation: Departments of Endocrinology and Metabolic Diseases, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, The Netherlands.
authors.forename: Janneke E
authors.initials: JE
authors.lastname: Witteveen
authors.forename: Job
authors.initials: J
authors.lastname: Kievit
authors.forename: Hans
authors.initials: H
authors.lastname: Morreau
authors.forename: Johannes A
authors.initials: JA
authors.lastname: Romijn
authors.forename: Neveen A T
authors.initials: NA
authors.lastname: Hamdy
mesh_terms: D000368:Aged; D002118:Calcium / Q000097:blood; D018572:Disease-Free Survival; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D049950:Hyperparathyroidism, Primary / Q000097:blood / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D010281:Parathyroid Hormone / Q000097:blood; D016105:Parathyroidectomy; D011183:Postoperative Complications / Q000097:blood / Q000517:prevention & control*; D011237:Predictive Value of Tests; D055502:Secondary Prevention; D013997:Time Factors
chemical_list: D010281:Parathyroid Hormone; D002118:Calcium