" /> Hyperaldosteronism, familial, type III - CISMeF





Preferred Label : Hyperaldosteronism, familial, type III;

Symbol : HALD3;

CISMeF acronym : HALD3;

Type : Phenotype, molecular basis known;

Alternative titles and symbols : Fh III;

Description : This form of hyperaldosteronism is characterized by hypertension secondary to massive adrenal mineralocorticoid production. Like patients with glucocorticoid-remediable aldosteronism (GRA, or FH I; 103900), patients with FH III present with childhood hypertension, elevated aldosteronism levels, and high levels of the hybrid steroids 18-oxocortisol and 18-hydroxycortisol. However, hypertension and aldosteronism in FH III are not reversed by administration of exogenous glucocorticoids and patients require adrenalectomy to control hypertension (Geller et al., 2008).;

Inheritance : Autosomal dominant;

Molecular basis : Caused by mutation in the member-5 subfamily-J inwardly rectifying potassium channel gene (KCNJ5, 600734.0002);

Laboratory abnormalities : Hypercalciuria (in some patients); Hypokalemia; Paradoxical increase or no change in serum aldosterone and blood pressure after dexamethasone administration; Decreased plasma renin activity;

Prefixed ID : #613677;

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04/06/2025


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