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[Immobilisation hypercalcaemia. 1 case (author's transl)].

A Baglin, A Goupil, A Lortat-Jacob

    La Nouvelle Presse Medicale
    |February 11, 1978
    PubMed
    Summary
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    Prolonged immobilization after severe trauma caused severe hypercalcemia in a young man. Increased bone resorption, not intestinal absorption, was the primary cause of elevated calcium levels.

    Area of Science:

    • Biochemistry
    • Orthopedics
    • Endocrinology

    Background:

    • Immobilization following severe trauma can lead to metabolic disturbances.
    • Hypercalcemia is a serious condition requiring investigation into its underlying causes.

    Observation:

    • A 21-year-old male presented with severe and prolonged hypercalcemia (up to 15.5 mg%) lasting 7 months.
    • During this period, plasma parathormone and calcitonin levels were undetectable.
    • Radioactive calcium studies indicated markedly increased bone resorption and moderately increased bone accretion, with minimal intestinal absorption.

    Findings:

    • Iliac bone biopsy showed dense calcification fronts and a complete absence of osteoid substance.
    • The hypercalcemia was attributed to significantly elevated bone resorption rates.

    Related Experiment Videos

  • Insufficient osteoid synthesis limited the compensatory increase in calcium accretion.

    • Implications:

    • This case highlights the critical role of bone remodeling in maintaining calcium homeostasis.
    • Understanding the imbalance between bone resorption and accretion is crucial for managing trauma-induced hypercalcemia.
    • Further research into the mechanisms of immobilization-related bone metabolic disorders is warranted.