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Pseudohypoaldosteronism

M J Dillon, J V Leonard, J M Buckler

    Archives of Disease in Childhood
    |June 1, 1980
    PubMed
    Summary
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    This study describes pseudohypoaldosteronism in 10 infants presenting with hyperkalemia and salt-wasting. Treatment with sodium chloride supplements was effective, suggesting a probable lack of renal tubular response to aldosterone.

    Area of Science:

    • Pediatrics
    • Endocrinology
    • Nephrology

    Background:

    • Pseudohypoaldosteronism is a rare condition characterized by hyperkalemia and salt-wasting.
    • Infants often present with normal renal and adrenocortical function, complicating diagnosis.

    Purpose of the Study:

    • To describe the clinical presentation and diagnostic findings of pseudohypoaldosteronism in infants.
    • To evaluate the treatment response to sodium chloride supplementation and exogenous mineralocorticoids.

    Main Methods:

    • Detailed clinical case descriptions of 10 infants with pseudohypoaldosteronism.
    • Biochemical analyses including plasma renin activity, plasma aldosterone concentration, and urinary aldosterone metabolite excretion.
    • Gas chromatography and mass spectrometry for urine analysis.

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    Main Results:

    • All infants presented with hyperkalemia and urinary salt-wasting.
    • Elevated plasma renin activity and plasma aldosterone concentration were observed.
    • Treatment with sodium chloride supplements was successful, with discontinuation possible by one year of age.
    • Exogenous mineralocorticoids were ineffective in treated infants.

    Conclusions:

    • Pseudohypoaldosteronism in infants is characterized by a lack of renal tubular response to aldosterone.
    • Sodium chloride supplementation is an effective treatment.
    • The condition may be more prevalent than previously thought, necessitating improved diagnostic techniques.