Individual site-specific bone mineral density gain in normocalcemic primary hyperparathyroidism

Area of Science:

• Endocrinology
• Bone Metabolism
• Surgical Outcomes

Background:

• Primary hyperparathyroidism (PHPT) can affect bone health, even in normocalcemic cases.
• Assessing bone mineral density (BMD) changes after parathyroidectomy (PTX) is crucial for managing PHPT.
• Identifying predictors of BMD gain post-PTX can optimize patient care.

Purpose of the Study:

• To evaluate individual-level BMD gains after PTX in normocalcemic PHPT patients.
• To determine factors that predict BMD improvement following PTX in this population.

Main Methods:

• A longitudinal cohort study included 55 PHPT patients with low bone mass treated with PTX.
• BMD gain was defined as a significant increase (≥0.030 g/cm²) at one or more sites after one year.
• Logistic regression analysis identified predictors of individual BMD gain.

Main Results:

• Nearly half (44.4%) of normocalcemic PHPT patients achieved significant BMD gain one year post-PTX, particularly at the spine and hip.
• Patients with hypercalcemia showed higher BMD gain rates (73.7%).
• Alkaline phosphatase (ALP) levels above the median independently predicted BMD gain in both the overall cohort and the normocalcemic group.

Conclusions:

• Successful PTX results in significant BMD gain in a substantial proportion of normocalcemic PHPT patients with reduced bone mass.
• Elevated ALP levels, indicating high bone turnover, may guide therapeutic decisions for optimizing bone health in these patients.