Risk Factors for Low Levels of Parathyroid Hormone after Surgery for Thyroid Cancer: A Single Center Study

Area of Science:

• Endocrinology
• Surgical Oncology
• Head and Neck Surgery

Background:

• Thyroidectomy is the primary treatment for thyroid cancer.
• Hypoparathyroidism is a common complication following thyroidectomy.
• Understanding risk factors for hypoparathyroidism is crucial for patient management.

Purpose of the Study:

• To identify patient- and surgical-related risk factors for hypoparathyroidism after thyroid cancer surgery.
• To evaluate the association between demographic data, surgical procedures, and hypoparathyroidism incidence.
• To analyze the impact of incidental parathyroidectomy on postoperative parathyroid hormone (PTH) levels.

Main Methods:

• Retrospective analysis of 189 patients undergoing thyroid cancer surgery (2016-2019).
• Evaluation of preoperative and postoperative serum calcium and PTH levels.
• Recording of demographic data, surgery type, and hypoparathyroidism/hypocalcemia incidence.

Main Results:

• Postoperative hypoparathyroidism (PTH < 12 pg/mL) was observed in 31.1% of patients.
• Female sex, neck dissection, lymph node yield, and incidental parathyroidectomy were significant risk factors.
• Incidental parathyroidectomy correlated with younger age (<40 years) and neck dissection.

Conclusions:

• Younger patients undergoing neck dissection with incidental parathyroidectomy are at highest risk.
• Impaired parathyroid gland vascularity may contribute to temporary hypocalcemia.
• Further research into parathyroid gland preservation techniques is warranted.