Autoimmune Encephalitis and Paraneoplastic Neurological Syndromes with Progressive Supranuclear Palsy-like...

Area of Science:

• Neurology
• Immunology

Background:

• Diagnostic advances increase AE/PNS diagnoses in patients with PSP-like symptoms.
• Distinguishing AE/PNS from PSP is crucial due to differing underlying causes and treatments.

Purpose of the Study:

• To compare clinical characteristics of AE/PNS and PSP.
• To outline diagnostic and treatment strategies for AE/PNS in PSP-like presentations.

Main Methods:

• Narrative review of clinical presentations, diagnostic methods, and treatments.
• Comparison of AE/PNS and PSP clinical features.
• Discussion of antibody detection techniques (tissue-based assays, cell-based assays, immunoblotting).

Main Results:

• Key antibodies in AE/PNS include anti-IgLON5, -Ma2, and -Ri, each with distinct clinical profiles.
• Diagnosis involves identifying atypical PSP presentations and confirming with antibody tests.
• Treatment encompasses immunotherapy (acute and maintenance) and tumor therapies.

Conclusions:

• A diagnostic challenge is the limited number of case reports on AE/PNS in PSP-like patients, especially concerning anti-IgLON5 antibodies.
• Further patient evaluations are necessary to clarify the association between specific antibodies and PSP-like manifestations.