Acute necrotizing encephalopathy associated with RANBP2 mutation: value of MRI findings for diagnosis and intervention

The Spectrum of Influenza-Associated Acute Necrotizing Encephalopathy of Childhood: A Case Series

BACKGROUND

Acute necrotizing encephalopathy of childhood (ANEC) is a rare inflammatory neurological disease with characteristic neuroimaging findings commonly leading to disability or death. It is associated with a variety of infectious agents, most commonly influenza.

METHODS

This study is a retrospective case series describing three children presenting with ANEC during the 2023-2024 influenza season.

RESULTS

All patients were influenza A positive with a variable duration of prodromal infectious symptoms. Each presented with witnessed or suspected seizures and persistent encephalopathy. Initial computed tomography (CT) was unremarkable in two patients; however, on follow-up neuroimaging all evolved multifocal brain lesions, including symmetric bilateral thalamic involvement consistent with ANEC. All patients received intravenous pulse methylprednisolone, but the timing and selection of additional immunomodulatory interventions differed between patients. Outcomes spanned from slight disability to death.

CONCLUSIONS

These patients illustrate the spectrum of ANEC presentations and outcomes and underscore the importance of prompt investigations in children with persistent encephalopathy and prodromal infectious symptoms, even with unremarkable findings on initial CT. The variability in treatment and outcomes within a single center emphasizes the need for further research to establish a better pathophysiologic understanding of ANEC and optimal treatment protocols.

Clinical characteristics and associated factors of pediatric acute necrotizing encephalopathy: a retrospective study

BACKGROUND

In the clinic, pediatric acute necrotizing encephalopathy (ANE) primarily affects children under 5 years of age and is characterized by severe brain damage and high mortality. However, some challenges remain regarding the diagnosis and treatment of ANE. In the present study, we analyzed the clinical characteristics and related factors of ANE with the aim of providing improved diagnostic and treatment strategies.

PURPOSE

The main purpose of this study is to gain a deeper understanding of the clinical characteristics and pathophysiology of ANE through a retrospective study, and to provide clinical practitioners with more effective. diagnostic and treatment strategies to improve patient survival rates and quality of life.

METHODS

Thirty-four pediatric ANE patients admitted to Zhejiang University School of Medicine Hospital between February 2019 and December 2023 were included in this study. To identify the factors associated with mortality, clinical, laboratory and imaging data were analyzed with independent-sample t tests, Mann-Whitney U tests, Fisher exact probability tests and receiver operating characteristic curve analyses.

RESULTS

In this cohort of 34 patients, the most common symptoms were fever, seizures, altered consciousness, vomiting, diarrhea and shock. The mortality rate was 55.9%. Laboratory tests revealed that patients who died had higher creatinine, lactate, activated partial thromboplastin time, thrombin time, interleukin (IL)-6, IL-10, creatine kinase, and D-dimer than survivors. Imaging examinations predominantly revealed symmetrical lesions in the thalamus. The fatal group displayed lower Glasgow Coma Scale (GCS) scores and severe complications. Other factors related to mortality included the arterial pH, GCS score and hospitalization duration.

CONCLUSION

The most common symptoms of ANE are fever, seizures, altered consciousness, vomiting, diarrhea and shock, and ANE has a high mortality rate. The GCS score and arterial pH are critical biomarkers for assessing the severity of ANE.

A Young Girl with Acute Encephalopathy Who Presented with Status Epilepticus Following a Flu-Like Illness

BACKGROUND Acute necrotizing encephalopathy of childhood (ANEC) is a rare form of acute encephalopathy in children that is characterized by rapid and progressive deterioration in the patient's clinical condition. Our aim in reporting the case is to highlight the importance of early diagnoses and aggressive early management of ANEC to achieve a better outcome. We report the case of a 5-year-old girl who presented with acute progressive encephalopathy with bilateral symmetrical thalamic involvement and brainstem lesion proceeded by a flu-like illness. CASE REPORT We report a 5-year-old girl who was previously healthy. She presented with rapid progressive encephalopathy and status epilepticus following a flu-like illness. Her magnetic resonance imaging (MRI) showed significance symmetrical bilateral thalamic enhancement with brainstem lesions, which is consistent with the diagnosis of ANEC of childhood, and her initial electroencephalogram (EEG) showed severe encephalopathy. Despite extensive management of ANEC, the patient showed a poor prognosis. CONCLUSIONS ANEC is a rare, specific, devastating condition in the pediatric population. Early diagnosis and aggressive management should be initiated immediately to avoid the high mortality associated with the condition. Furthermore, to highlight the importance of the clear history of the patient who presented with rapid and progressive deterioration in the level of consciousness and status epilepticus proceeded by viral illness, a rapid neuroradiological images such as brain MRI should be obtained to confirm the diagnosis of this rare condition. We also seek to increase awareness of this disorder among healthcare workers and general practitioners.