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Seasonal Difference in Postthyroidectomy Hypocalcemia: A Montreal-Based Study.

Marco A Mascarella1, Véronique-Isabelle Forest2, Carol Nhan2

  • 1Department of Otolaryngology-Head and Neck Surgery, McGill University Health Center, Montreal, Canada marco.mascarella@mail.mcgill.ca.

Otolaryngology--Head and Neck Surgery : Official Journal of American Academy of Otolaryngology-Head and Neck Surgery
|November 15, 2015
PubMed
Summary

Thyroidectomy patients operated in winter face a higher risk of hypocalcemia. This seasonal variation in post-thyroidectomy hypocalcemia highlights potential links to vitamin D levels.

Keywords:
hypocalcemiaseasonal variationthyroidectomy

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Area of Science:

  • Endocrinology
  • Surgical Oncology
  • Public Health

Background:

  • Post-thyroidectomy hypocalcemia is a significant complication, increasing hospital stays and posing life-threatening risks.
  • Understanding factors influencing hypocalcemia is crucial for improving patient outcomes after thyroid surgery.

Purpose of the Study:

  • To investigate the association between the season of thyroidectomy and the incidence of postoperative hypocalcemia.
  • To identify potential seasonal trends in hypocalcemia risk following thyroid malignancy surgery.

Main Methods:

  • Retrospective case series of 823 patients undergoing thyroidectomy for thyroid malignancy between 2009 and 2015.
  • Data collected included patient demographics, procedure type, supplementation, and seasonal rates of hypocalcemia.
  • Statistical analysis, including multiple regression, was used to compare seasonal rates and identify predictors of hypocalcemia.

Main Results:

  • Winter surgeries showed significantly higher rates of hypocalcemia (8.3%) compared to summer surgeries (1.5%).
  • Patients operated in winter were 5.6 times more likely to develop hypocalcemia than those in summer.
  • Winter surgery was a predictor of hypocalcemia, even after accounting for supplementation and procedure type.

Conclusions:

  • Thyroidectomy performed during winter months is associated with an increased risk of postoperative hypocalcemia.
  • The observed seasonal variation suggests a potential role for vitamin D, warranting further investigation.
  • These findings emphasize the need for season-aware management strategies for patients undergoing thyroidectomy.