Postoperative hypoparathyroidism after completion thyroidectomy for well-differentiated thyroid cancer

Area of Science:

• Endocrinology
• Surgical Oncology
• Otolaryngology

Background:

• Postoperative hypoparathyroidism (HPT) is a potential complication of thyroid surgery.
• Staged surgical approaches may influence the incidence of HPT.

Purpose of the Study:

• To investigate if staged thyroid surgery impacts the rate of postoperative hypoparathyroidism (HPT).
• To identify risk factors associated with postoperative HPT.

Main Methods:

• Retrospective observational study of 786 patients undergoing thyroid surgery.
• Patients were divided into single-stage total thyroidectomy (TT) and staged completion thyroidectomy (cT) groups.
• Primary endpoints were transient and permanent HPT at 6-month follow-up; secondary outcomes included risk factor analysis.

Main Results:

• Transient HPT rates were significantly higher in the single-stage TT group compared to the staged cT group (P = 0.0057).
• Female sex was an independent risk factor for transient HPT in the TT group (P = 0.0012).
• Number of parathyroid glands remaining in situ (PGRIS) was an independent risk factor for both transient and permanent HPT in the TT group (P < 0.0001 and P = 0.0002, respectively).

Conclusions:

• Staged thyroid surgery, specifically completion thyroidectomy, appears to be associated with a lower risk of transient postoperative HPT.
• Female sex and PGRIS are significant independent risk factors for HPT.
• Findings can inform surgical planning to minimize endocrine complications, especially with increasing use of conservative thyroid surgery.