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Vitamin D deficiency and severe hyperparathyroidism
S Jonard1, M Gauthier-Morgenstern, C Douillard
1Service d'Endocrinologie et Maladies Métaboliques, CHU, Lille, France.
Annales D'Endocrinologie
|January 16, 2003
Summary
Severe hyperparathyroidism (HPT) with osteitis fibrosa cystica, exacerbated by vitamin D deficiency, is rare. This case highlights HPT
Area of Science:
- Endocrinology
- Oncology
- Bone Metabolism
Background:
- Primary hyperparathyroidism (HPT) with severe skeletal manifestations like osteitis fibrosa cystica is uncommon.
- Vitamin D deficiency can significantly worsen HPT's osseous effects.
Observation:
- A 31-year-old woman presented with a tibial tumor and functional impairment, diagnosed with HPT and severe vitamin D deficiency.
- Laboratory findings revealed hypercalcemia, elevated parathyroid hormone (PTH), and profoundly low vitamin D levels.
- Technetium-99m-sestamibi (MIBI) uptake in the tibial lesion suggested a brown tumor.
Findings:
- Surgical removal of a parathyroid adenoma and the brown tumor led to normalized calcemia and urinary calcium levels.
- Vitamin D levels improved with supplementation, but PTH remained elevated post-surgery.
- Bone mineral density significantly improved one year after treatment, indicating bone repair.
Implications:
- This case underscores the severe skeletal consequences of HPT, particularly when combined with vitamin D deficiency.
- MIBI uptake can aid in diagnosing brown tumors associated with HPT.
- Vitamin D deficiency impacts postoperative outcomes, potentially causing transient hypocalcemia due to bone calcium uptake.
- A potential association between HPT and HELLP syndrome is suggested.