Cognitive outcomes in anti-LGI-1 encephalitis

Area of Science:

• Neuroimmunology
• Cognitive Neurology

Background:

• Anti-leucine rich glioma inactivated 1 (anti-LGI-1) encephalitis is an autoimmune condition often presenting with cognitive impairment.
• The specific cognitive profile and long-term sequelae in anti-LGI-1 encephalitis remain incompletely understood.

Purpose of the Study:

• To characterize the detailed cognitive profile of patients diagnosed with anti-LGI-1 encephalitis.
• To compare cognitive impairment patterns in anti-LGI-1 encephalitis patients with healthy controls (HC), amnestic mild cognitive impairment (aMCI), and temporal lobe epilepsy (TLE) patients.

Main Methods:

• Retrospective analysis of neuropsychological assessment data from adult patients with anti-LGI-1 encephalitis.
• Comparative analysis against HC, aMCI, and TLE patient cohorts with documented temporal lobe/limbic involvement.

Main Results:

• All 10 anti-LGI-1 encephalitis patients exhibited cognitive deficits, with 80% impaired on two or more measures.
• Patients showed significant impairments in basic attention, vigilance, psychomotor speed, complex figure copying, and learning/memory compared to controls.
• Anti-LGI-1 patients demonstrated similar impairment patterns to TLE patients but differed from aMCI patients in attention and verbal memory deficits.

Conclusions:

• Long-term cognitive deficits are prevalent in anti-LGI-1 encephalitis, affecting multiple cognitive domains.
• Findings suggest a distinct cognitive profile that warrants further investigation in larger patient cohorts.