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Bone density and microarchitecture in endogenous hypercortisolism.

Camila V dos Santos1, Leonardo Vieira Neto1,2, Miguel Madeira1,3

  • 1Division of Endocrinology, Department of Internal Medicine, Clementino Fraga Filho University Hospital-Federal University of Rio de Janeiro (HUCFF-UFRJ), Rio de Janeiro, Brazil.

Clinical Endocrinology
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PubMed
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This summary is machine-generated.

Endogenous hypercortisolism, or Cushing's syndrome, significantly impairs bone health, particularly cortical bone microstructure. These effects on bone density and structure are more detrimental than gonadal status in patients with Cushing's syndrome.

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Area of Science:

  • Endocrinology
  • Bone Metabolism
  • Osteoporosis Research

Background:

  • Osteoporosis is a significant complication of endogenous hypercortisolism (Cushing's syndrome), increasing fracture risk.
  • Bone fragility in Cushing's syndrome may stem from microarchitectural changes, not just reduced bone mineral density (BMD).

Purpose of the Study:

  • To investigate bone density and microarchitecture in patients with endogenous Cushing's syndrome.
  • To compare bone health parameters between patients with Cushing's syndrome and matched controls.

Main Methods:

  • A cross-sectional study involving 30 patients with active Cushing's syndrome and 51 controls.
  • Areal BMD assessed by DXA (lumbar spine, femoral neck, total femur, radius).
  • Volumetric bone density (vBMD) and structure evaluated using HR-pQCT (distal radius and tibia).

Main Results:

  • Patients with Cushing's syndrome showed lower areal BMD and Z-scores in the lumbar spine, femoral neck, and total femur.
  • HR-pQCT revealed reduced cortical area, thickness, and density, along with lower total vBMD in the radius and tibia of CS patients.
  • These bone microarchitectural and densitometric deficits persisted even after excluding hypogonadal individuals.

Conclusions:

  • Endogenous hypercortisolism has detrimental effects on bone, particularly impacting cortical bone microstructure.
  • The observed bone impairment in Cushing's syndrome is primarily driven by hypercortisolism, outweighing the influence of gonadal status.