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Case Reports
Syndrome of inappropriate secretion of antidiuretic hormone associated with idiopathic normal pressure hydrocephalus.
- M Yoshino, Y Yoshimi, M Taniguchi, S Nakamura, and T Ikeda.
- Department of Internal Medicine, Tsuruga City Hospital.
- Intern. Med. 1999 Mar 1; 38 (3): 290-2.
AbstractA 79-year-old woman suffering from urinary incontinence and unsteady gait was diagnosed as having idiopathic normal pressure hydrocephalus (NPH) with hyponatremia due to the syndrome of inappropriate secretion of antidiuretic hormone (SIADH). The concentration of antidiuretic hormone was high while the plasma osmolality was low in the presence of concentrated urine during the episodes of hyponatremia. Magnetic resonance imaging (MRI) of the head showed enlargement of the third and lateral ventricles. After ventriculoperitoneal shunt surgery, the symptoms of NPH and hyponatremia improved. It may be possibly explained that mechanical pressure on the hypothalamus from the third ventricle is responsible for hyponatremia.
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