- Based on MRI scans, 11/37 patients (30%) had "non-confluent multifocal white matter hyperintense lesions on FLAIR and diffusion sequences, with variable enhancement, with associated hemorrhagic lesions".

Smith College

- 37 patients with severe COVID-19 met the criteria of the study
- Patients were evaluated from March 23th, 2020 to April 27th, 2020 at 16 different hospitals 

Prevalence of Various Types of Brain Damage due to COVID-19

Kremer, S., Lersy, F., Sèze, J. D., Ferré, J., Maamar, A., Carsin-Nicol, B., . . . Cotton, P. F. (2020). Brain MRI Findings in Severe COVID-19: A Retrospective Observational Study. Radiology, 202222. doi:10.1148/radiol.2020202222
https://pubs.rsna.org/doi/full/10.1148/radiol.2020202222

Brain MRI Findings in Severe COVID-19: A Retrospective Observational Study

- Based on MRI scans, 16/37 (43%) of patients had signal abnormalities located in the medial temporal lobe

Signal abnormalities located in the medial temporal lobe

Non-confluent multifocal white matter hyperintense lesions 

- Based on MRI scans, 9/37 patients (24%) had extensive and isolated white matter microhemorrhages 

Extensive and isolated white matter microhemorrhages

- This patient was a 57-year old man whose MRIs showed extensive and isolated white matter microhemorrhages.

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