Abstract
Purpose
As the incidence of thyroid cancer has increased, hypocalcemia, a common complication of thyroid surgery, has become a serious problem. However, no definite predictor of postoperative hypocalcemia is known. In this study, our purpose was to investigate the potential role of vitamin D as a predictor of postoperative hypocalcemia.
Methods
A prospective observational study was performed on patients who underwent total thyroidectomy for thyroid cancer performed by a single experienced surgeon between October 2013 and September 2014.
Measurements
Their serum 25-OH vitamin D levels were measured preoperatively. On the day after surgery, serum calcium and intact parathyroid hormone levels were measured, and symptoms of hypocalcemia were recorded.
Results
Of the 134 patients, laboratory and symptomatic hypocalcemia developed in 52 patients (39 %) and 25 patients (19 %), on the day after surgery. The preoperative vitamin D level was 16.5 ± 9.2 ng/mL, and this value did not differ according to laboratory or symptomatic hypocalcemia (p = 0.94). The incidence of laboratory or symptomatic hypocalcemia did not differ according to vitamin D deficiency. Only incidental parathyroidectomy was associated with symptomatic hypocalcemia (p = 0.03).
Conclusions
Vitamin D level is not a predictor of hypocalcemia after total thyroidectomy for thyroid cancer. Thus, routine preoperative screening for vitamin D is not recommended.
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Acknowledgments
This study was supported by a grant of the KCCH Research Competence Promotion (KRP), Korea Institute of Radiological and Medical Sciences (50246–2014).
Conflicts of interest
The authors declare that they have no conflict of interest.
Authors’ contribution
G. H. L. and M. J. K. contributed to the study conception and design, analysis and interpretation of data, and drafting of the manuscript. G. H. L. and M. L. collected the data. Y. H. K. and H. I. K. participated in the drafting and critical revision of the manuscript.
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Lee, G.H., Ku, Y.H., Kim, H.I. et al. Vitamin D level is not a predictor of hypocalcemia after total thyroidectomy. Langenbecks Arch Surg 400, 617–622 (2015). https://doi.org/10.1007/s00423-015-1311-1
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DOI: https://doi.org/10.1007/s00423-015-1311-1