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KMID : 0438420100170020115
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Korean Journal of Bone Metabolism
2010 Volume.17 No. 2 p.115 ~ p.120
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A Case of Pseudohypoparathyroidism Type Ib Diagnosed by Ellsworth-Howard Test
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Cho Kyoung-Min
Park So-Hee
Hwang You-Chul
Jeong In-Kyung
Ahn Kyu-Jeong
Chung Ho-Yeon
Chon Suk
Oh Seung-Joon
Woo Jeong-Taek
Kim Sung-Woon
Kim Jin-Woo
Kim Young-Seol
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Abstract
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Pseudohypoparathyroidism (PHP) is a hereditary disorder characterized by symptoms and signs of hypocalcemia and
distinctive skeletal defects such as Albright’s hereditary osteodystrophy (AHO). PHP mimics hormone-deficient forms
of hypoparathyroidism, with hyopcalcemia and hyperphosphatemia, but the parathyroid hormone (PTH) is elevated.
Hypocalcemia of PHP is due to a deficient end-organ response to PTH. PHP is classified into four different subtypes
(Ia, Ib, Ic, II) based on the presence or the absence of additional endocrine abnormalities, deficiency of the α-subunit
of the stimulatory G protein, and the dysmorphic features of AHO. We report a case of PHP type Ib diagnosed by
Ellsworth-Howard test.
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KEYWORD
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Ellsworth-Howard’s test, Hypocalcemia, Pseudohypoparathyroidism
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