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Secondary hyperparathyroidism — Clinical Guidelines

Overview

Secondary hyperparathyroidism (SHPT) arises from chronic kidney disease (CKD) or vitamin D deficiency, characterized by elevated parathyroid hormone (PTH) levels leading to parathyroid hyperplasia and mineral imbalances 1 7.

Diagnosis

Elevated serum PTH levels 1 7.

Low serum calcium and high serum phosphate levels 1 7.

Low 25-hydroxyvitamin D (25(OH)D) levels 4 5.

Imaging may show parathyroid gland enlargement 7.

Evaluate dietary history for deficiencies in calcium and vitamin D 8.

Management

First-line treatments:

- Calcimimetics (e.g., etelcalcetide, evocalcet) to lower PTH levels 1 2. - Active vitamin D analogs (e.g., paricalcitol) to manage mineral imbalances 6.

Adjunctive treatments:

- Calcium supplementation to correct hypocalcemia 6. - Phosphate binders to manage hyperphosphatemia 1 6. - Vitamin D supplementation (cholecalciferol) to address deficiency 4 5.

Special Populations

Pediatrics: Dietary deficiencies in calcium and vitamin D can lead to severe complications like myocardial calcification, requiring prompt correction 8.

Elderly: Heterogeneity in response to vitamin D supplementation; individualized dosing may be necessary 4.

Key Recommendations

Use calcimimetics for managing elevated PTH levels in SHPT (Evidence: Strong 1 2).

Correct vitamin D deficiency with appropriate supplementation to improve 25(OH)D levels and reduce PTH (Evidence: Moderate 4 5).

Employ active vitamin D analogs to effectively suppress PTH without significantly increasing intestinal calcium absorption (Evidence: Moderate 6).

Monitor and manage calcium and phosphate levels closely, adjusting treatments as needed (Evidence: Expert opinion).

References

1 Zou C, Wang X, Huang R, Hu H. Real-world safety profile of etelcalcetide in dialysis-related secondary hyperparathyroidism: a pharmacovigilance analysis of FAERS data. Renal failure 2025. link 2 Parfrey PS. Evocalcet in the management of secondary hyperparathyroidism in dialysis patients. Kidney international 2018. link 3 Arcidiacono MV, Yang J, Fernandez E, Dusso A. The induction of C/EBPβ contributes to vitamin D inhibition of ADAM17 expression and parathyroid hyperplasia in kidney disease. Nephrology, dialysis, transplantation : official publication of the European Dialysis and Transplant Association - European Renal Association 2015. link 4 Giusti A, Barone A, Pioli G, Girasole G, Razzano M, Pizzonia M et al.. Heterogeneity in serum 25-hydroxy-vitamin D response to cholecalciferol in elderly women with secondary hyperparathyroidism and vitamin D deficiency. Journal of the American Geriatrics Society 2010. link 5 Björkman M, Sorva A, Tilvis R. Responses of parathyroid hormone to vitamin D supplementation: a systematic review of clinical trials. Archives of gerontology and geriatrics 2009. link 6 Hafner V, Rutsch C, Ding R, Heinrich T, Diedrichs L, Schmidt-Gayk H et al.. Calcium balance during calcitriol and paricalcitol administration in healthy humans. International journal of clinical pharmacology and therapeutics 2008. link 7 Dusso AS, Sato T, Arcidiacono MV, Alvarez-Hernandez D, Yang J, Gonzalez-Suarez I et al.. Pathogenic mechanisms for parathyroid hyperplasia. Kidney international. Supplement 2006. link 8 Zaidi AN, Ceneviva GD, Phipps LM, Dettorre MD, Mart CR, Thomas NJ. Myocardial calcification caused by secondary hyperparathyroidism due to dietary deficiency of calcium and vitamin D. Pediatric cardiology 2005. link

Secondary hyperparathyroidism