Case of Acute Necrotizing Encephalitis Following Coronavirus Disease 2019 Infection—A Rare Presentation

Coronavirus disease 2019 (COVID-19) results from infection by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Typical presentations include fever, shortness of breath, and cough though neurological manifestations have been rarely reported. Acute necrotizing encephalitis is a rare manifestation of COVID-19 and can be associated with devastating neurological outcomes. Difficulty in timely acquisition of neuroimaging and high rates of early mortality in these patients hinder timely diagnosis. In this clinicoradiological syndrome, patients suffer from rapidly worsening encephalopathy in first 2 weeks of illness and necrotizing parenchymal changes on neuroimaging. The pathophysiology is hypothesized to occur due to cytokine storm, blood-brain-barrier dysfunction, and viral-mediated immune dysregulation leading to endotheliopathy. Early immunomodulatory treatment with intravenous immunoglobulin and steroids is associated with a favorable outcome. Here, we report a one-and-half-year-old boy who presented with fever, seizures, and decreased activity since 3 days. He was noted to have hypertonia in all four limbs with exaggerated deep tendon reflexes. Nasopharyngeal reverse transcriptase polymerase chain reaction test for SARS-CoV-2 was positive. Magnetic resonance imaging brain was suggestive of acute necrotizing encephalopathy. Patient was treated with steroids.

Central neuroinflammation in Covid-19: a systematic review of 182 cases with encephalitis, acute disseminated encephalomyelitis, and necrotizing encephalopathies.

Growing evidence demonstrates the association of encephalitis, meningoencephalitis or encephalomyelitis, with SARS-CoV-2 infection. This study aims to determine the profile and possible mechanisms behind CNS inflammatory diseases in the context of Covid-19. We conducted a systematic review of case reports on Covid-19-related encephalitis, meningoencephalitis, acute necrotizing encephalitis, and acute disseminated encephalomyelitis in adults, published before January 2021. A total of 182 cases (encephalitis = 109, meningoencephalitis = 26, acute disseminated encephalomyelitis = 35, acute necrotizing (hemorrhagic) encephalitis = 12) were included. While cerebrospinal fluid (CSF) pleocytosis and increased protein level was present in less than 50%, magnetic resonance imaging (MRI) and electroencephalogram (EEG) were abnormal in 78 and 93.2% of all cases, respectively. Viral particles were detected in cerebrospinal fluid of only 13 patients and autoantibodies were present in seven patients. All patients presented with altered mental status, either in the form of impaired consciousness or psychological/cognitive decline. Seizure, cranial nerve signs, motor, and reflex abnormalities were among associated symptoms. Covid-19-associated encephalitis presents with a distinctive profile requiring thorough diagnosis and thereby a comprehensive knowledge of the disease. The clinical profile of brain inflammation in Covid-19 exhibits majority of abnormal imaging and electroencephalography findings with mild/moderate pleocytosis or proteinorrhachia as prevalent as normal cerebrospinal fluid (CSF). Oligoclonal bands and autoantibody assessments are useful in further evaluating neuro-covid patients, as supported by our pooled evidence. Despite the possibility that direct viral invasion cannot be easily estimated, it is still more likely that immune-mediated or autoimmune reactions play a more important role in SARS-CoV-2 neuroinflammation.

Acute Necrotizing Encephalopathy Associated With SARS-CoV-2 Exposure in a Pediatric Patient.

We present the case of a nine-month-old male child with three days of fever, irritability, left focal seizure, and febrile focal status epilepticus. He had no history of previous comorbidities. A lumbar puncture was performed, which showed cerebrospinal fluid (CSF) leukocytosis; protein and glucose were normal, and the polymerase chain reaction (PCR) panel for 14 pathogens in CSF was negative. Immunoglobulin G (IgG) qualitative and quantitative tests were positive for coronavirus disease 2019 (COVID-19) upon arrival. An MRI performed one week after the initial onset showed findings suggestive of acute necrotizing encephalopathy (ANE). The patient required mechanical ventilation. However, his symptoms did not improve and follow-up imaging two weeks later showed progression of the disease with hemorrhagic changes. To our knowledge, this is the first reported case of ANE associated with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-​2) infection in a pediatric patient.

Autoimmune Hemolytic Anemia in a 24-Year-Old Patient With COVID-19 Complicated by Secondary Cryptococcemia and Acute Necrotizing Encephalitis: A Case Report and Review of Literature.

Since the initial reported outbreak of coronavirus disease 2019 (COVID-19), many unique case reports have been published in the medical literature. Here we report a complicated clinical course of a young patient with COVID-19 who presented initially with recurrent autoimmune hemolytic anemia (AIHA). He subsequently developed bilateral pulmonary emboli, and ultimately succumbed to encephalitis and cryptococcemia in the context of being treated with high dose immunosuppression for the AIHA. Combining immunosuppression with active COVID-19 infection presents some truly challenging diagnostic and management scenarios which this case summarizes and highlights very well. Based on this case, we propose some strategies on how to approach these difficult decisions while also recognizing the significant gaps that exist in such an evolving topic. Lastly, this case also represents a potentially novel presentation of secondary fungal infection of the central nervous system (CNS) related to COVID-19.

Acute Necrotizing Encephalitis as a Probable Association of COVID-19.

BACKGROUND: Meanwhile, over 50 lakh people have now been affected by coronavirus disease-2019 (COVID-19) across the globe. There are various reports on neurological manifestations of COVID-19, which have attracted broad attention. Acute necrotizing encephalopathy (ANE) is a rare complication of influenza and other viral infections and has been related to intracranial cytokine storm, which results in breach in blood-brain barrier leading to encephalitis like presentation. We report an unusual case of acute necrotizing encephalitis as a solitary presentation of COVID-19. CASE DESCRIPTION: We report a case of 35-year-old man from Bihar, presented to our emergency department in unconscious state, with high-grade fever and vomiting since last 5 days. Previous magnetic resonance imaging (MRI) brain showed a left parasellar-middle cranial fossa mass looks most likely like an invasive meningioma. Urgent noncontrast computed tomography scan (NCCT) brain showed that mass as well as hypodensities in both thalami and left caudate nucleus. As per our institutional protocol, clinical management of raised intracranial pressure was initiated. As there is no current evidence from any randomized control trails (RCTs) to recommend any specific treatment for suspected or confirmed patients with COVID-19 with acute necrotizing encephalitis. CONCLUSION: Our case highlights the importance of identifying encephalitis as a presenting sign of COVID-19 based on NCCT findings with normal cerebrospinal fluid (CSF) and normal chest X-ray (CXR) findings. HOW TO CITE THIS ARTICLE: Kumar N, Kumar S, Kumar A, Pati BK, Kumar A, Singh C, et al. Acute Necrotizing Encephalitis as a Probable Association of COVID-19. Indian J Crit Care Med 2020;24(10):991-994.

Acute Necrotizing Encephalitis in Viral Respiratory Tract Infection: An Autopsy Case Report.

Acute necrotizing encephalitis (ANE) is a rare complication of viral respiratory tract infections, with specific histological changes. The condition is most commonly described in the pediatric population, however, it can also develop in the elderly, with some genetic factors being described as contributory. Herein, we report the autopsy finding of a patient with a viral respiratory tract infection, complicated with ANE. The patient was a 77-year-old female with multiple comorbidities living in a social home. For the two months prior, she had been hospitalized with cerebral infarction, respiratory tract infection, and exacerbation of chronic cardiac failure and concomitant hypertension and type 2 diabetes. On gross examination, the brain was edematous, with ground-glass opacity meninges a focus of encephalomalacia in the right cerebral hemisphere and multiple petechial hemorrhages. Histology revealed diffuse foci of encephalitis, with large areas of neuronal necrosis (coagulative-like necrosis) around the blood vessels and a sharp border with the surrounding healthy parenchyma - ANE. The patients tested negative for coronavirus disease 2019 (COVID-19).