Journal of Laboratory Physicians
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ORIGINAL ARTICLE
Year : 2010  |  Volume : 2  |  Issue : 1  |  Page : 10-13

Delayed serum calcium biochemical response to successful parathyroidectomy in primary hyperparathyroidism


Notre-Dame Hospital University of Montreal Chum Montreal, QC, Canada

Correspondence Address:
Edgard Nassif
Notre-Dame Hospital University of Montreal Chum Montreal, QC
Canada
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0974-2727.66700

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Background : Parathyroidectomy is considered the standard treatment for primary hyperparathyroidism, however, though the onset of biochemical response is variable and is different from one patient to the other. Aim : To evaluate the onset of systemic response and the biochemical normalization of serum calcium levels to a successful surgery. Patients and Methods : In a retrospective fashion, we collected clinical data from 303 patients admitted to our hospital between 2005 and 2008, with a diagnosis of primary hyperparathyroidism after sestamibi localization. The pathology reports, parathyroidectomy results, the preoperative and postoperative parathormone (PTH) and serum calcium levels were reviewed. Response of each patient to the surgery was studied and all the data were analyzed to determine how fast the serum calcium levels drop. Results : The majority of patients (72.9%, 221/303) showed a decrease in their serum calcium levels to normal values within 48 h. While in 40 patients it took 72 hours and 42 patients (13.8%) had a delayed normalization for more than 72 h. The pathology in the PH group was predominantly of a single adenoma 80.9% vs.19.1 with hyperplasia with a P of 0.03. Preoperative parathyroid hormone PTH elevation was not significantly deferent between the two groups (PH and EN) with a mean of 7.9±5.36 vs. 7.41±14.5 pmol/L respectively with a P of 0.43. Conclusion : The majority of patients with primary hyperparathyroidism (PHP) respond to parathyroidectomy in the form of normalization of their serum calcium levels and PTH within 48 h; however, a certain group of patients will need more than 3 days.


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