What is cerebral salt wasting (CSW)?

Updated: Aug 16, 2019
  • Author: Christie P Thomas, MBBS, FRCP, FASN, FAHA; Chief Editor: Vecihi Batuman, MD, FASN  more...
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The term cerebral salt wasting (CSW) was introduced in the 1950s to describe an entity seen with certain cerebral disorders that can impair the ability of the kidneys to conserve Na+, with resultant salt wasting and polyuria. CSW is defined as the renal loss of Na+ with intracranial disease, which leads to hyponatremia and a decrease in extracellular fluid volume. [23, 24]

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