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A rare form of pseudohyperaldosteronism with characteristics of very early-onset and severe hypertension associated with low renin levels and hypoaldosteronism. Caused by homozygous or compound heterozygous loss-of-function mutations or deletions in the HSD11B2 gene (16q22). In all cases, these mutations lead to abolition or a marked decrease in the activity of 11-beta-hydroxysteroid dehydrogenase type 2 (11-beta-HSD2), an enzyme involved in the conversion of cortisol to cortisone. Transmission is autosomal recessive.
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