Case 15-2020: A 79-Year-Old Man with Hyponatremia and Involuntary Movements of the Arm and Face

• DOI: 10.1056/nejmcpc1913477
• Publication Date: 2020-05-13T20:57:20Z
• Authors: Cynthia M. Cooper; Pui W. Cheung; Ellen B. Penney; Jenny J. Linnoila
• Keywords: Male; Dyskinesias; Osmolar Concentration; Sodium; 05 social sciences; Intracellular Signaling Peptides and Proteins; Genetic Diseases, X-Linked; Hashimoto Disease; Methylprednisolone; 3. Good health; Diagnosis, Differential; Inappropriate ADH Syndrome; Face; Arm; Encephalitis; Humans; 0501 psychology and cognitive sciences; Glucocorticoids; Blood Chemical Analysis; Aged; Hyponatremia

A 79-year-old man was admitted to this hospital because of hyponatremia and involuntary movements, which would start in the left arm hand then involve side face, such that he look as though grimacing. After received treatment for hyponatremia, movements worsened. diagnosis made.