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연세대학교 의과대학 Yonsei Medical Journal Yonsei Medical Journal 제56권 제1호
발행연도
2015.1
수록면
300 - 303 (4page)

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Hypoparathyroidism, deafness, and renal dysplasia (HDR) syndrome is a rare conditioninherited as autosomal dominant trait and characterized by hypoparathyroidism,sensorineural deafness, and renal dysplasia. HDR syndrome is caused by haploinsufficiencyof the GATA3 gene located on chromosome 10p15. Here, we report the case of a 32-day-old Korean male with HDR syndrome. He was presented due to repeated seizures over previous 3 days. The patient was born after 40 weeks of gestation with birth weight of 2930 g, and was the first-born baby of healthy Koreanparents. Hypoparathyroidism was first noticed due to seizure. A multicystic left dysplastic kidney and vesicoureteral reflux were detected by ultrasound after birth. Auditory brainstem response (ABR) testing revealed that the patient had moderate sensorineural deafness, with hearing losses of 80 dB at the mid and higher frequenciesfor both ears. Echocardiography finding revealed secundum atrial septal deftect. Based on biochemical results and clinical findings, a presumptive diagnosis of HDR syndrome was made. GATA3 mutation analysis identified a heterozygous deletion, c.153del (p.Phe51Leufs*144) in exon 1 causing a frameshift mutation, which is a novel de novo mutation. Therefore, we suggest that HDR syndrome should be considered in the differential diagnosis in symptomatic or asymptomatic patients with hypoparathyroidism, and that renal ultrasound or ABR testing be performedto prevent a missed diagnosis. This is the first report on Korean patient with confirmed HDR syndrome with novel mutation.

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