What are the signs and symptoms of cerebral salt-wasting syndrome (CSWS) (renal salt wasting)?

Updated: May 13, 2020
  • Author: Sudha Garimella, MBBS; Chief Editor: Sasigarn A Bowden, MD  more...
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Answer

As the decline in serum sodium concentration reduces serum osmolality, a tonicity gradient develops across the blood-brain barrier that causes cerebral edema. Symptoms include lethargy, agitation, headache, altered consciousness, seizures, and coma. [15]

The severity of symptoms typically reflects the magnitude and rapidity of the decrease in serum sodium concentration.

Intravascular volume depletion

Historical features suggesting hypovolemia include thirst, abrupt weight loss, decreasing urinary frequency, and negative fluid balance.


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