In addition to hyponatremia, what other finding must be present in syndrome of inappropriate antidiuretic hormone secretion (SIADH)?

Updated: Aug 16, 2019
  • Author: Christie P Thomas, MBBS, FRCP, FASN, FAHA; Chief Editor: Vecihi Batuman, MD, FASN  more...
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Hyponatremia (ie, serum Na+< 135 mmol/L) is a defining feature of SIADH. In SIADH, the hyponatremia is associated with measured serum hypo-osmolality.

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