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Updated: Apr 14, 2026

Murine Bilateral Renal Lymphadenectomy
Published on: December 30, 2025
Tuberculous lymphadenitis and syndrome of inappropriate antidiuresis, improbable partners
Helena Vitorino1, Andrea Castanheira1, Manuela Zita Veiga1
1Department of Medicina 1, Centro Hospitalar Lisboa Ocidental, Hospital de Egas Moniz, Lisbon, Portugal.
Abstract:
A patient with acute respiratory infection and severe hyponatraemia was admitted to our department. The hyponatraemia study was compatible with syndrome of inappropriate antidiuresis (SIAD) and an association with the respiratory problem was initially assumed. The recurrence of hyponatraemia after resolution of the pulmonary infection led to further investigation and to the diagnosis of tuberculous lymphadenitis. After treatment of this condition, discontinuation of SIAD treatment was possible, making this association presumable. We would like to highlight the importance of considering alternative conditions in the approach to SIAD.
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