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Cortical bone mineral content in primary hyperparathyroidism. Changes after parathyroidectomy.
Acta Endocrinologica
|April 1, 1986
Summary
Primary hyperparathyroidism (PHPT) significantly reduces bone mineral content (BMC). While parathyroidectomy can increase BMC, bone loss in PHPT patients is largely irreversible, especially in severe cases.
Area of Science:
- Endocrinology
- Bone Metabolism
- Mineral Disorders
Background:
- Primary hyperparathyroidism (PHPT) is a common endocrine disorder.
- PHPT is associated with significant bone mineral loss, particularly in cortical bone.
- The extent and reversibility of bone loss in PHPT require further investigation.
Purpose of the Study:
- To assess bone mineral content (BMC) in patients with primary hyperparathyroidism.
- To evaluate the impact of parathyroidectomy on BMC.
- To determine the long-term bone recovery after surgical intervention.
Main Methods:
- Photon absorptiometry using a 241Am source was employed to measure BMC at the mid-radius (95% cortical bone).
- 35 patients with moderate to severe primary hyperparathyroidism were included.
- Bone mineral content was reassessed in 14 patients 9 to 26 months post-parathyroidectomy.
Main Results:
- Patients with PHPT exhibited significantly reduced BMC, averaging 75.1% of normal values.
- Parathyroidectomy led to an average BMC increase of 9.9% in treated patients.
- A strong negative correlation was observed between initial bone mass and post-surgical BMC gain, indicating poorer recovery in those with lower initial bone density.
Conclusions:
- Cortical bone loss in primary hyperparathyroidism is predominantly irreversible, even after successful parathyroidectomy.
- While surgery can lead to some bone mass recovery, it is often insufficient to normalize bone density in PHPT patients.
- The degree of initial bone loss influences the potential for recovery following treatment for PHPT.