Brain scans show that the SARS-CoV-2 virus, which causes COVID-19, may alter parts of the brain and cause a loss of smell, doctors from the U.S. and Italy say in a new JAMA Neurology paper. More information:
The authors describe the scans of a 25-year-old Italian radiographer who began experiencing symptoms after working in a COVID-19 ward. The woman had a mild dry cough for a day and then lost her sense of smell and taste.
However, a brain scan showed inflammation in her olfactory bulb, which involves the sense of smell. Then they gave her a COVID-19 test, and she was positive. They ruled out other causes for the loss of smell, such as other viral infections. In follow-up brain scans 28 days later, the abnormalities had disappeared. The woman recovered her sense of smell.
The normal brain imaging in other COVID-19 patients and the recovery in the 25-year-old patient’s follow-up scans “suggest that imaging changes are not always present in COVID-19 or might be limited to the very early phase of infection,” they wrote.
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