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The Capital Region of Denmark - a part of Copenhagen University Hospital
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Recovery From SIADH-Associated Osteoporosis: A Case Report

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INTRODUCTION: Recent studies show an association between hyponatremia and osteoporosis. We have previously reported a case of severe male osteoporosis due to chronic syndrome of inappropriate secretion of antidiuretic hormone (SIADH). Here, we provide a follow-up on this case after cure of the condition that further supports the causal relationship.

THE CASE: A 38-year-old man had been diagnosed with severe osteoporosis most likely due to chronic SIADH. The SIADH was believed to be idiopathic. A magnetic resonance imaging scan, however, revealed a tumor in the sinus, and biopsies showed an esthesioneuroblastoma, immunohistochemically positive for antidiuretic hormone (ADH). After the tumor was removed, ADH and sodium levels normalized. A dual-energy x-ray absorptiometry scan performed 7 months after the patient's last surgery showed a significant spontaneous improvement in bone mineral density in the lumbar vertebrae.

CONCLUSION: This case provides evidence for a causal relationship between SIADH and chronic hyponatremia and impaired bone metabolism that can lead to severe secondary osteoporosis. The effect on bone metabolism is at least partially reversible.

Original languageEnglish
JournalThe Journal of clinical endocrinology and metabolism
Volume99
Issue number10
Pages (from-to)3527-30
Number of pages4
ISSN0021-972X
DOIs
Publication statusPublished - Oct 2014

ID: 44628078