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  Vol. 138 No. 7, July 1984 TABLE OF CONTENTS
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The Development of Pseudohypoparathyroidism

Involvement of Progressively Increasing Serum Parathyroid Hormone Concentrations, Increased 1,25-Dihydroxyvitamin D Concentrations, and 'Migratory' Subcutaneous Calcifications

Reginald C. Tsang, MBBS; Pankaja Venkataraman, MBBS; Mona Ho, MSc; Jean J. Steichen, MD; Jeffrey Whitsett, MD; Frank Greer, MD

Am J Dis Child. 1984;138(7):654-658.


Abstract

• The hormonal changes in the development of pseudohypoparathyroidism (PSH) have not, to our knowledge, been previously reported. The male sibling of a child with PSH was studied for 21/2 years. At 1 year of age he had generalized subcutaneous calcifications that subsequently migrated over his body. At 3 years of age and over a six-month period, serum calcium levels fell; serum phosphorus, parathyroid hormone (PTH), and 1,25-dihydroxyvitamin D (1,25-[OH]2D) concentrations increased. There was no calcemic, phosphaturic, or urinary cyclic adenosine monophosphate response to PTH. The concentration of serum PTH was suppressed by infusion of calcium and doubled with edetic acid infusion, indicating that the parathyroids were sensitive to changes in calcium levels. Thus, increasing PTH and increased 1,25-(OH)2D concentrations occur in the development of PSH. Migratory skin calcifications may occur. We speculate that increasing the serum PTH level reflects increasing compensatory parathyroid production to overcome a progressive PTH receptor defect and serves, with increased 1,25-(OH)2D concentrations, to prevent severe falls in serum calcium concentrations in the early stage of the disease.

(AJDC 1984;138:654-658)



Author Affiliations

From the Newborn Division, Department of Pediatrics and the Department of Obstetrics and Gynecology, University of Cincinnati College of Medicine, and the Children's Hospital Research Foundation, Cincinnati.


Footnotes

Read in part before the annual meeting of the American Society for Bone and Mineral Research, Cincinnati, June 15, 1981.

Reprint requests to University of Cincinnati Medical Center, 231 Bethesda Ave, Cincinnati, OH 45267-0541 (Dr Tsang).



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