Long-Term Outcomes and Predictors of Recurrence in Primary Hyperparathyroidism

Area of Science:

• Endocrinology
• Surgical Oncology
• Neurosurgery

Background:

• Primary hyperparathyroidism (PHPT) is effectively managed with parathyroidectomy.
• Recurrence of PHPT after parathyroidectomy can occur, sometimes after long intervals.
• Understanding factors associated with long-term recurrence is crucial for patient management.

Purpose of the Study:

• To analyze factors associated with long-term recurrence after initial parathyroidectomy for sporadic primary hyperparathyroidism.
• To differentiate between early and late recurrence patterns and their predictors.

Main Methods:

• Retrospective cohort study of 2029 patients undergoing parathyroidectomy for sporadic PHPT.
• Exclusion of patients with familial syndromes, prior surgery, carcinoma, persistent disease, or inadequate follow-up.
• Recurrence defined as normocalcemia at 6 months followed by hypercalcemia with elevated parathyroid hormone (PTH) or reoperation, categorized as early (<60 months) or late (≥60 months).

Main Results:

• Overall recurrence rate was 1% for early (<60 months) and 5% for late (≥60 months).
• Early recurrence associated with multigland disease, more gland resections, higher intraoperative PTH, and higher 6-month calcium/PTH.
• Late recurrence patients resembled non-recurrent patients, differing mainly by higher 15-minute intraoperative PTH; they had higher preoperative PTH and greater intraoperative PTH decline than early recurrence patients.

Conclusions:

• Parathyroidectomy offers a high cure rate, but distinct recurrence patterns exist.
• Late recurrence is more common and often represents de novo disease after single-gland resection.
• Prolonged biochemical surveillance is recommended for patients with high-normal postoperative calcium/PTH and modest intraoperative PTH decline.