The Different Clinical Features Between Autoimmune and Infectious Status Epilepticus

Area of Science:

• Neurology
• Neuroimmunology
• Infectious Diseases

Background:

• Status epilepticus (SE) prognosis depends on its cause, with CNS inflammation (infectious or autoimmune) being a treatable etiology.
• Differentiating infectious and autoimmune SE is challenging due to similar initial presentations but requires distinct treatments.

Purpose of the Study:

• To identify clinical feature differences between infectious and autoimmune SE to guide initial investigations and therapies.
• To improve outcomes for patients experiencing SE by aiding etiological differentiation.

Main Methods:

• Retrospective analysis of 501 SE patients over 10.5 years.
• Patients with inflammatory SE were categorized into infectious (n=21) and autoimmune (n=25) groups.
• Clinical features, SE severity scores, treatment, and outcomes were recorded, alongside CSF, EEG, and MRI data.

Main Results:

• Inflammatory etiology was found in 9.2% of SE patients.
• Autoimmune SE patients were younger and predominantly female, with higher rates of psychosis, non-convulsive SE, and super refractory SE.
• No significant difference in prognosis was observed between autoimmune and infectious SE groups.

Conclusions:

• Clinical presentations and patient demographics offer clues to SE etiology.
• Features like younger age, female sex, psychosis, non-convulsive SE, and super refractory SE suggest autoimmune SE when inflammatory etiology is suspected.