ArticleFrontiers in cellular neuroscience2026
Case Report: A case of paraneoplastic autoimmune encephalitis with concurrent anti-GABABR and anti-SOX1 antibody positivity.
Article in Frontiers in cellular neuroscience, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Background: Paraneoplastic autoimmune encephalitis (PAE) is most commonly associated with small cell lung cancer (SCLC). Anti- Case presentation: A 75-year-old man presented with episodic impaired consciousness, behavioural disturbance and rapid cognitive decline. Brain MRI showed bilateral hippocampal signal abnormalities. A cell-based assay (CBA) detected anti-GABABR antibodies at high titre in serum (1:3200) and cerebrospinal fluid (CSF; 1:1000), while a tissue-based assay (TBA) on rat brain confirmed a neuronal cell-surface staining pattern; the full paraneoplastic panel, including anti-SOX1, was negative, and initial tumour screening was unrevealing. A diagnosis of anti-GABABR encephalitis (initially regarded as non-paraneoplastic) was made and the patient improved with intravenous immunoglobulin (IVIG), high-dose corticosteroids and maintenance mycophenolate mofetil. During a refractory second relapse 5 months later, repeat CBA showed rising anti-GABA Conclusion: Apparently isolated anti-GABA
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