A 62‐Year‐Old Man With Progressive Weakness, Multiple Neurologic Deficits, and Hypernatremia
2014
History of the presenting symptom The patient had a 6-month history of unsteady gait and generalized weakness with constitutional symptoms of loss of weight and appetite. He consulted his general practitioner 2 months later. Laboratory investigations then showed normal complete blood count and liver and thyroid function tests. Magnetic resonance imaging (MRI) of the brain with contrast fluid-attenuated inversion recovery (FLAIR) sequences and diffusion-weighted imaging showed multiple nonspecific foci of an abnormal signal seen in the white matter of both cerebral hemispheres. VDRL serology was nonreactive. The only abnormal investigation was an elevated serum sodium level at 148 mmoles/liter (reference interval 135–145). He was referred to a neurologist, who made a diagnosis of multiple system atrophy based on features of cerebellar dysfunction and dysautonomia, which included orthostatic hypotension and erectile dysfunction. His serum vitamin E level was 11.3 mg/liter (reference interval 5.5–18.0). He was commenced on highdose oral vitamin E therapy as an antioxidant for multiple system atrophy. He subsequently presented to the general medicine department and was admitted for progression of symptoms. Medical history He had been attending long-term followup visits with his general practitioner for hyperlipidemia and type 2 diabetes mellitus for 10 years. Glycosylated hemoglobin (HbA1c) 2 months prior to admission was 11.8%. His regular medications included lovastatin, glipizide, and vitamin E tablets. He had no recent exposure to anyone with tuberculosis or history of pulmonary tuberculosis.
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