Cross-sectional Cranial CT Imaging Findings and Patterns in Clinically Diagnosed COVID-19 Cases in a Tertiary Referral Center.

Background: Coronavirus Disease 2019 (COVID-19), caused by the SARS-CoV-2 virus, presents not only as a respiratory ailment but also poses risks of neurological complications whose underlying mechanisms remain unclear. These complications range from mild to severe and may involve direct invasion of the central nervous system (CNS), disruption of the blood-brain barrier, or systemic cytokine effects. Diagnostic challenges persist due to the suboptimal sensitivity of RT-PCR assays.

Objective: The present study aimed to review the contrast and non-contrast enhanced cranial CT images of all diagnosed COVID-19 patients in a tertiary referral center with the clinical impression of non-traumatic and nonoperative CNS pathologies.

Methods: We conducted a cross-sectional study analyzing CT images of COVID-19 patients with neurological symptoms. Among 51 included patients, plain CT scans were predominantly used, revealing no acute infarcts or hemorrhages in the majority, while frontal lobe involvement was notable in cases with pathology. Chronic infarcts or ischemic changes were observed in over half of the cases, primarily affecting the anterior circulation. Only one case of meningitis was documented.

Results: In the final analysis, 51 patients met the inclusion criteria out of the initial 64 enrolled. The study population, predominantly male with a mean age of 58.02 ± 20.87 years, mainly comprised patients solely diagnosed with COVID-19. Plain CT scans were favored over contrast-enhanced scans (76.50%, n = 39). While most patients had no acute infarcts or hemorrhages, the frontal lobe was commonly affected among stroke patients (9.8%, n = 5). Additionally, a significant portion of patients without acute stroke findings exhibited chronic infarcts or ischemic changes (57.69%, n = 15).

Conclusions: This study sheds light on the radiological patterns of CNS involvement in COVID-19 patients, highlighting frequent frontal lobe involvement possibly attributed to hypercoagulability and endotheliitis. Further research with larger sample sizes and MRI utilization is recommended to enhance our understanding of CNS manifestations in COVID-19. This study contributes to understanding COVID-19 neurological sequelae, particularly in terms of radiological patterns, among patients presenting with neurological symptoms. The findings highlight the need for comprehensive evaluation and management of neurological complications in COVID-19 patients.