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Chronic hypoparathyroidism is associated with increased cortical bone density evaluated using high-resolution

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Women with chronic postsurgical hypoparathyroidism (hypoPT) showed higher bone mineral density (BMD) and cortical bone measures. Despite low fracture risk, some patients had vertebral fractures, with unclear links to bone turnover.

Keywords:
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Area of Science:

  • Endocrinology
  • Bone Metabolism
  • Radiology

Background:

  • Chronic postsurgical hypoparathyroidism (hypoPT) can affect bone health.
  • Understanding bone mineral density (BMD), microarchitecture, and fracture risk in hypoPT is crucial.

Purpose of the Study:

  • To assess BMD, bone microarchitecture, and fracture prevalence in women with chronic postsurgical hypoPT.
  • Compare these parameters between hypoPT patients and healthy controls.

Main Methods:

  • Cross-sectional study comparing 27 women with hypoPT and 44 controls.
  • Dual-energy X-ray absorptiometry (DXA) for areal BMD and vertebral fractures.
  • High-resolution peripheral quantitative CT (HR-pQCT) for volumetric BMD and microarchitecture.
  • Biochemical markers (FGF23, ICTP, P1NP) and FRAX tool for fracture risk assessment.

Main Results:

  • No prevalent clinical fractures, low FRAX-estimated risk for major/hip fractures.
  • Two hypoPT patients had moderate to severe morphometric vertebral fractures.
  • HypoPT women had higher areal BMD (lumbar spine, hip) and cortical volumetric BMD (radius, tibia).
  • Trabecular bone was unaffected; low bone turnover suggested by P1NP and ICTP.

Conclusions:

  • Fragility fracture prevalence was low in hypoPT women, aligning with low FRAX risk.
  • HypoPT patients exhibited increased areal and cortical volumetric BMD compared to controls.
  • The association between higher bone density and decreased bone turnover in hypoPT remains unclear.