Hyponatremia resulting from arginine vasopressin receptor 2 gene mutation.

Abstract excerpt

Chronic hyponatremia, unless associated with extracellular fluid volume expansion, is an infrequent electrolyte imbalance in pediatrics. We report an infant with chronic hyponatremia suggestive of a syndrome of inappropriate secretion of antidiuretic hormone (SIADH), in the absence of ADH secretion. A mutation was found in the same codon of the gene that results in a loss-of- function of arginine vasopressin...

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