Long-term outcome after parathyroidectomy for lithium-induced hyperparathyroidism

Area of Science:

• Endocrinology
• Surgical Oncology
• Nephrology

Background:

• The standard surgical management for lithium-associated hyperparathyroidism (LiHPT) is open four-gland parathyroid exploration (OPTX).
• Recent studies question OPTX due to high recurrence rates, contrasting with the promotion of unilateral focused parathyroidectomy.
• This study addresses the controversy by evaluating long-term surgical outcomes and preoperative imaging accuracy for LiHPT.

Purpose of the Study:

• To evaluate the long-term outcomes of surgical interventions for lithium-associated hyperparathyroidism (LiHPT).
• To assess the accuracy of preoperative imaging modalities (sestamibi scintigraphy and ultrasound) in identifying single-gland versus multigland disease in LiHPT patients.
• To compare the effectiveness of different surgical approaches for LiHPT.

Main Methods:

• Retrospective cohort study of patients undergoing initial surgery for LiHPT between 1990 and 2013.
• Kaplan-Meier method used to calculate cumulative recurrence rates.
• Sensitivity and specificity of sestamibi scintigraphy and ultrasound were evaluated against intraoperative findings.

Main Results:

• Of 48 patients, 45 underwent OPTX and 3 had focused parathyroidectomy; multiglandular disease was found in 27 patients.
• The 10-year cumulative recurrence rate was 16%. No permanent complications occurred.
• For concordant imaging, sensitivity for single-gland disease was 5/9 and specificity was 5/8.

Conclusions:

• Surgical management of LiHPT is safe and effective, yielding a long-term cure rate exceeding 80%.
• The study supports surgical intervention as a viable option for LiHPT.
• Preoperative imaging accuracy requires further investigation for optimal surgical planning.