Rasmussen encephalitis and comorbid autoimmune diseases: A window into disease mechanism?

Area of Science:

• Neurology
• Immunology
• Genetics

Background:

• Rasmussen encephalitis (RE) is a rare, chronic inflammatory neurological disease affecting one cerebral hemisphere.
• The exact pathogenesis of RE remains poorly understood, with autoimmune mechanisms proposed.

Observation:

• This case series describes 4 patients diagnosed with RE who later developed comorbid autoimmune diseases.
• The identified autoimmune conditions included Hashimoto thyroiditis, ulcerative colitis, Crohn disease, and systemic lupus erythematosus.

Findings:

• The co-occurrence of RE and autoimmune diseases suggests a potential shared susceptibility.
• Common immunogenetic and environmental risk factors may underlie both RE and autoimmune conditions.

Implications:

• Understanding shared risk factors could lead to novel therapeutic strategies for RE.
• This association may refine diagnostic approaches and highlight the role of autoimmunity in RE pathogenesis.