Introduction: The 2019 coronavirus, known as SARS-CoV-2 and COVID-19, was named a pandemic by the WHO in March 2020. It binds to the ACE-2 receptor and transmembrane serine protease 2 and is highly virulent. There are many sequelae of this virus, including neurological consequences. We have performed a literature review of the neurological sequelae of COVID-19 with relation to neuroimaging and then present a case series. Case Series: Seven cases were seen by neurology consultants at the Hospital for Special Surgery in New York City between February and May of 2020; 5 met criteria. The majority of these consultations were called for encephalopathy. Some had neuroimaging of brain MRI or head CT, which all showed microvascular disease. One case had prior imaging without microvascular disease. Summary/Conclusion: It is known that vascular disease is a risk factor for severe COVID-19 infection. This case series demonstrates presence of microvascular disease in patients with encephalopathy. We know that microvascular disease can be a risk factor for toxic metabolic encephalopathy. It is unclear if the microvascular disease was present prior to infection, although at least one patient had prior imaging without microvascular disease. More research is needed to determine if COVID-19 infection can cause vascular disease.

Summary Background & Aims Little is known about cholestasis including its most severe variant secondary sclerosing cholangitis (SSC), in critically ill patients with coronavirus disease 19 (COVID‐19). In this study we analyzed the occurrence of cholestatic liver injury and SSC, including clinical, serological, radiological and histopathological findings. Methods We conducted a retrospective single‐center analysis of all consecutive patients admitted to the intensive care unit (ICU) due to severe COVID‐19 at the University Hospital Zurich to describe cholestatic injury in these patients. The findings were compared to a retrospective cohort of patients with severe influenza A Results 34 patients with severe COVID‐19 admitted to the ICU were included. 14 patients (41%) had no cholestasis (group 0), 11 patients (32%, group 1) developed mild and 9 patients (27%, group 2) severe cholestasis. Patients in group 2 had a more complicated disease course indicated by significantly longer ICU stay (median 51 days IQR 25‐86.5) than the other groups (group 0 median 9.5 days IQR 3.8‐18.3 p =0.001 and group 1 median 16 days IQR 8‐30 p < 0.05 respectively). Four patients in group 2 developed SSC compared to none in the influenza A cohort. The available histopathological findings suggest an ischemic damage to the perihilar bile ducts. Conclusions The development of SSC represents an important complication of critically ill COVID‐19 patients and needs to be considered in the diagnostic work up in prolonged cholestasis. The occurrence of SSC is of interest in the ongoing pandemic since it is associated with considerable morbidity and mortality.

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