Evaluating Fracture Risk in Primary Hyperparathyroidism: FRAX and Surgical Outcomes

Overview

In a large cohort of nearly 60,000 patients with primary hyperparathyroidism (PHPT), FRAX underestimated fracture risk, but surgical management was associated with reduced fracture incidence when certain FRAX thresholds were exceeded. These findings suggest that FRAX-based risk assessment can inform surgical decision-making beyond current guidelines.

Background

Primary hyperparathyroidism (PHPT) is associated with increased fracture risk, traditionally assessed using dual-energy radiographic densitometry and prior fracture history. Current guidelines recommend parathyroidectomy based on T-scores below −2.5 or prior fractures, but lack FRAX-based thresholds. The FRAX tool estimates 10-year fracture risk but has not been fully validated in PHPT populations until recently. Adjusting fracture risk assessment in PHPT patients may improve management decisions.

Data Highlights

Key Findings

• FRAX underestimates major osteoporotic and hip fracture risk in PHPT patients.
• Surgical management reduces fracture incidence when FRAX MOF risk exceeds 1.2% and hip fracture risk exceeds 2.7%.
• Use of FRAX thresholds would increase surgical recommendations by approximately 25% compared to current criteria.
• Surgery is associated with about a 9% reduction in fractures at all sites except head, hands, and feet.
• Low-trauma fracture at any site is a valid indication for parathyroidectomy.
• FRAX-based risk assessment can be performed without densitometry, facilitating broader clinical use.

Clinical Implications

FRAX-based fracture risk assessment provides valuable data to guide surgical decision-making in PHPT beyond traditional densitometry and fracture history criteria. Incorporating FRAX thresholds may identify additional patients who benefit from parathyroidectomy, potentially reducing fracture burden. Clinicians should consider patient preferences, surgical expertise, and other PHPT manifestations when deciding management.

Conclusion

This study supports the integration of FRAX-based fracture risk assessment into PHPT management, enabling more precise and individualized surgical recommendations. While surgery reduces fracture risk, comprehensive clinical judgment remains essential.

References

1. Sant et al. 2024 -- Evaluating Fracture Risk in Patients with Primary Hyperparathyroidism
2. Current International Guidelines -- Skeletal Criteria for Parathyroidectomy
3. Danish Cohort Study -- FRAX Adjustments in PHPT
4. Studies on FRAX Adjustments in Special Populations