To the Editor The Viewpoint by Roberts and Petersen1 asserts that the enlargement of the cerebral ventricles of astronauts after long-duration spaceflight is a form of normal-pressure hydrocephalus (NPH). We contend that this claim is incorrect and that it mischaracterizes a disorder affecting astronauts known as spaceflight-associated neuro-ocular syndrome (SANS).2
Williams MA, Malm J. Mischaracterization of Spaceflight-Associated Neuro-ocular Syndrome. JAMA Neurol. Published online August 12, 2019. doi:10.1001/jamaneurol.2019.2376
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