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Background

Familial hyperaldosteronism type III (FH-III) is a rare autosomal dominant disease for which five missense mutations in KCNJ5 have been identified. FH-III has a wide phenotypic variability from spironolactone-responsive hyperaldosteronism to massive adrenal hypertrophy with drug-resistant hypertension. This variation has mainly been attributed to genotype, because, in contrast to other genotypes (G151R, T158A, I157S, and Y152C), (1) FH-III patients with G151E have shown milder phenotype, and (2) G151E-harboring cells were found to have rapid lethality due to much larger sodium conductance of the encoded channel (Kir3.4), which prevents adrenal hypertrophy.

Methods

Here we describe the clinical course of a sporadic case of FH-III, with de novo G151R mutation.

Results

The patient developed polyuria at around 1.5 years of age and developed hypertension and hypokalemia by 4 years of age. Thereafter, spironolactone treatment successfully ameliorated hyperaldosteronism for 7 years with no discernible adrenal enlargement.

Conclusion

Diverse clinical severity in FH-III cannot be defined solely by KCNJ5 genotype."xsd:string
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http://purl.uniprot.org/citations/24819081http://purl.uniprot.org/core/author"Hasegawa T."xsd:string
http://purl.uniprot.org/citations/24819081http://purl.uniprot.org/core/author"Sugiyama K."xsd:string
http://purl.uniprot.org/citations/24819081http://purl.uniprot.org/core/author"Adachi M."xsd:string
http://purl.uniprot.org/citations/24819081http://purl.uniprot.org/core/author"Homma K."xsd:string
http://purl.uniprot.org/citations/24819081http://purl.uniprot.org/core/author"Asakura Y."xsd:string
http://purl.uniprot.org/citations/24819081http://purl.uniprot.org/core/author"Muroya K."xsd:string
http://purl.uniprot.org/citations/24819081http://purl.uniprot.org/core/date"2014"xsd:gYear
http://purl.uniprot.org/citations/24819081http://purl.uniprot.org/core/name"Horm Res Paediatr"xsd:string
http://purl.uniprot.org/citations/24819081http://purl.uniprot.org/core/pages"138-142"xsd:string
http://purl.uniprot.org/citations/24819081http://purl.uniprot.org/core/title"Discordant genotype-phenotype correlation in familial hyperaldosteronism type III with KCNJ5 gene mutation: a patient report and review of the literature."xsd:string
http://purl.uniprot.org/citations/24819081http://purl.uniprot.org/core/volume"82"xsd:string
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