Fixed Hyponatremia with Normal Responses to Varying Salt and Water Intakes

Abstract
THERE are many well documented cases of cerebral disease causing hyponatremia due to the inappropriate secretion of antidiuretic hormone.1 A cerebral salt-wasting syndrome with clinical dehydration has also been described.2 The present report concerns a patient with cerebrovascular disease who had a fixed serum sodium concentration of 120 mEq per liter and responded appropriately to variations in his salt and water intake.Case ReportJ.W. (M.H. 46–58–11), a 48-year-old black man, was admitted in a comatose state from another hospital on March 27, 1970, after a fall. On carotid arteriography an occlusion of the left internal carotid artery at its . . .

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