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Related Experiment Videos

Pseudohypoparathyroidism associated with hypercalcitoninaemia

G Wägar, J Lehtivuori, I Salvén

    Acta Endocrinologica
    |January 1, 1980
    PubMed
    Summary

    This study reports a rare case of pseudohypoparathyroidism type I in a 33-year-old man, who also presented with high calcitonin levels and deficiencies in prolactin and growth hormone.

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    Area of Science:

    • Endocrinology
    • Human genetics
    • Metabolic disorders

    Background:

    • Pseudohypoparathyroidism (PHP) is a group of genetic disorders characterized by resistance to parathyroid hormone (PTH).
    • PHP type I involves specific physical characteristics and hormonal imbalances.
    • Albright's osteodystrophy is a common clinical manifestation of PHP.

    Observation:

    • A 33-year-old male patient presented with features suggestive of pseudohypoparathyroidism type I.
    • Diagnostic tests confirmed pseudohypoparathyroidism, showing no cyclic AMP or phosphaturic response to PTH infusion.
    • Endocrine evaluation revealed normal pituitary/thyroid, pituitary/testis axes, and adrenal cortex function.

    Findings:

    • The patient exhibited lower-than-normal basal prolactin levels and a blunted growth hormone response to glucagon.
    • Significantly elevated basal calcitonin levels were observed, with hyperresponsiveness to pentagastrin stimulation.
    • Despite hypercalcitonemia, serum calcium levels were only slightly decreased. Thyroid gland examination and biopsy showed no signs of medullary carcinoma.

    Implications:

    • This case highlights a complex endocrine presentation associated with pseudohypoparathyroidism type I.
    • The unexplained hypercalcitonemia in the absence of medullary thyroid carcinoma warrants further investigation.
    • The co-occurrence of PHP with prolactin and growth hormone deficiencies suggests potential broader pituitary involvement or related genetic factors.

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