A Pseudohypoparathyroidism Type Ia Patient with Normocalcemia

Endocrine Journal

Toshihiro TAJIMA¹  Hiroko SUZUKI²  Seiji KANDA²  Yasuko TAMADA²  Toshimasa NISHIYAMA² 

[1] Department of Pediatrics, Hokkaido University School of Medicine;Department of Public Health, Kansai Medical University

关键词: PHP-Ia;    Albright's hereditary osteodystrophy;    Missense mutation;    Normocalcemia;   

DOI  :  10.1507/endocrj.K07E-019

学科分类：内分泌与代谢学

来源: Japan Endocrine Society

【 摘 要 】

References(17)Cited-By(3)Pseudohypoparathyroidism type Ia (PHP-Ia), one of 4 types of PHP, is a genetic disease characterized by clinical hypoparathyroidism caused by parathyroid hormone (PTH) resistance. In addition, patients with PHP-Ia show resistance to other hormones as well as Albright's hereditary osteodystrophy (AHO), a constellation of features including short stature, obesity, brachydactyly, ectopic ossifications, and/or mental retardation. Hypocalcemia is one of the hallmarks of PHP-Ia, but several PHP-Ia patients have been described to have normocalcemia. We encountered a 10-year-old girl with typical Albright's hereditary osteodystrophy with round face, short stature, brachydactyly, and obesity. Biochemical examination showed normocalcemia and increased PTH levels. Ellsworth-Howard test did not show any responses of urinary cAMP and phosphate. Based on these findings, she was diagnosed as having PHP-Ia with normocalcemia. Sequencing analysis of the GNAS gene identified a heterozygous missense mutation in exon 13 (R385H), which was previously reported in a PHP-Ia patient. The exact reason for her normocalcemia is not determined, but we must recognize heterogeneous biochemical findings even in PHP-Ia.

【 授权许可】

Unknown