Factors contributing to unintentional parathyroidectomy during thyroid surgery

Area of Science:

• Endocrinology
• Surgical Oncology
• Head and Neck Surgery

Background:

• Unintentional parathyroidectomy during thyroid surgery occurs in 1-31% of cases.
• Malignancy and central neck dissection are known risk factors.
• Impact of other factors like thyroiditis or hyperthyroidism remains unclear.

Purpose of the Study:

• To identify factors contributing to parathyroid gland loss during thyroid surgery.
• To evaluate the role of malignancy, central neck dissection, thyroiditis, hyperthyroidism, and primary hyperparathyroidism.

Main Methods:

• Retrospective review of 269 patients undergoing thyroid surgery (2010-2013).
• Analysis of patient characteristics and surgical factors.
• Bivariate and multivariable analyses to determine risk factors for parathyroid loss.

Main Results:

• 24.5% of patients experienced unintentional parathyroidectomy.
• Smaller thyroid nodule size, central neck dissection, and malignancy were associated with parathyroid loss.
• Central neck dissection was the strongest predictor (OR 4.72).

Conclusions:

• Central neck dissection for thyroid malignancy is the leading risk factor for unintentional parathyroidectomy.
• Concomitant primary hyperparathyroidism, lymphocytic thyroiditis, or hyperthyroidism did not increase risk.