Diagnostic advances and therapeutic perspectives in a syndrome of inappropriate antidiuretic secretion
Keywords:
Hyponatremia, vasopressin, differential diagnosis, emerging therapiesAbstract
The pathophysiological complexity of the syndrome of inappropriate antidiuretic hormone secretion (SIADH) requires a detailed understanding of the mechanisms that disrupt fluid and electrolyte homeostasis. Resulting dilutional hyponatremia not only compromises neurological function but also complicates differentiation from other water-balance disorders. Early recognition of clinical and biochemical patterns, alongside accurate interpretation of plasma and urine osmolalities, has become essential to prevent misdiagnosis and potential clinical deterioration. Recent advances have broadened the therapeutic landscape, providing options that extend beyond traditional fluid restriction. Hypertonic saline, vasopressin V2-receptor antagonists, and revised approaches to the pharmacological management of comorbidities offer more targeted and effective interventions. Additionally, the identification of secondary etiologies—such as occult malignancies, central nervous system infections, or drug-induced effects—enables tailored strategies that help achieve sustained correction of the disorder. The incorporation of advanced diagnostic tools and individualized therapies enhances clinical safety, reduces episodes of severe hyponatremia, and improves patient outcomes. Altogether, updated perspectives on SIADH are reshaping the modern clinical approach to the syndrome, emphasizing the importance of an interdisciplinary framework that integrates physiology, clinical assessment, and evidence-based therapeutics.
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Copyright (c) 2026 Alex Ramón Valencia-Herrera, Lesly Doménica Valdiviezo-Arias, Juan Carlos Coronel-Melendres, Bladimir Orlando Uscha-Maliza
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